(d) 220 V. 1. Check valves are designed to prevent the reversal of flow in a piping system. The figure here shows electric field lines. Access NCERT Solutions for Class 7 Science Chapter 14 Electric Current and Its Effects. Answer: (d) there are momentary galvanometer deflections that die out shortly; the deflection are in opposite directions. For a current in a long straight solenoid, N- and S-poles are created at the two ends. (b) No two field lines can cross each other (a) Flemings right-hand rule is a simple rule to know the direction of induced current. Click Start Quiz to begin! As mentioned, voltage is defined as the electric potential difference per unit charge between two points in an electric field. Magnetic field lines indicate the magnetic fields direction. F = (F * 9/5) + 32 F (F * 9/5) = 32-4/5 * F = 32 F = -32 * 5/4 F = -40. The safety device which is used to protect the circuit from short circuiting and overloading The closeness or density of the field lines is directly proportional to the strength of the field. (d) concentric circles near the point O but of elliptical shapes as we go away from it. (d) white. Answer: (c) the pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet. Answer: (d) In India, the AC changes direction after every \(\frac{1}{50}\) second. An electric motor is rotating device that converts energy to energy. 1000+ Electromagnetic Theory MCQ PDF arranged chapterwise! No tracking or performance measurement cookies were served with this page. We have over 5000 electrical and electronics engineering multiple choice questions (MCQs) and answers with hints for each question. RD Sharma Solutions , RS Aggarwal Solutions and NCERT Solutions. (a) concentric circles 4. (b) the strong magnetic field produced inside the solenoid can be used to magnetise a piece of magnetic material like soft iron, when placed inside the coil Faradays law states that a current will be induced in a conductor which is exposed to a changing magnetic field. Magnetic field lines form a closed-loop. The pressure of the fluid passing through the system opens the valve, while any reversal of flow will close the valve. This condition can be partially corrected by using an external lever and weight. 4. Closure is accomplished by the weight of the check mechanism, by back pressure, by a spring, or by a combination of these means. Fuse, Down: 5. Magnetic Effects of Electric Current Class 10 MCQs Questions with Answers. In the formula, B represents the magnetic flux density, 0 is the magnetic constant whose value is 4 x 10-7 Hm-1 or 12.57 x 10-7 Hm-1, N represents the number of turns, and I is the current flowing through the solenoid. This distance is measured in terms of armature slots or armature conductors that come between two adjacent pole centers. NCERT Solutions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current aid students in improving the self-confidence in their preparation for the examinations. The general types of check valves are swing, tilting-disk, piston, butterfly, and stop. The seating surface is placed at a slight angle to permit easier opening at lower pressures, more positive sealing, and less shock when closing under higher pressures. According to new CBSE Exam Pattern, MCQ Questions for Class 10 Science pdf Carries 20 Marks. Question 8. Put your understanding of this concept to test by answering a few MCQs. Its SI unit is Weber and in CGS is Maxwell. Full membership to the IDM is for researchers who are fully committed to conducting their research in the IDM, preferably accommodated in the IDM complex, for 5-year terms, which are renewable. Both the Celsius to Fahrenheit and Fahrenheit to Celsius equations are linear (no quadratic terms) implying they are straight lines. Test Your Knowledge On Properties Of Magnetic Field Lines! Question 15. Question 13. Colour of insulation of live wire, Answer: (c) Field lines can cross each other Optimized production requires extensive data analysis - of machines, production lines, entire factories. (b) use of fuse Pole pitch is defined as the peripheral distance between the center of two adjacent poles in a DC machine. Question 5. Check the direction in which the compass needle points and mark the direction. Alternating current (a) directly above the wire Then It will immensely help anyone trying to crack an exam or an interview. 2011-2022 Sanfoundry. This was changed around the time of Celsius death in 1744, by two eminent contemporary scientists working independently of each other Frenchman Jean-Pierre Christin and Celsius fellow Swede Carolus Linnaeus. About Our Coalition. 1. In the arrangement shown in the figure there are two coils wound on a non-conducting cylindrical rod. The impedance offered by the system to the flow of zero sequence current is known as zero sequence impedance. Inside the magnet, the direction of the magnetic field lines is from the south pole to the north pole. (b) elliptical in shape A circular loop placed in a plane perpendicular to the plane of paper carries a current when the keys is ON. Magnetic Field Unit and Measurement You can refer to NCERT Solutions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams. The magnetic field is stronger at the poles because the field lines are denser near the poles. Then the key is inserted and later removed. 3. (c) straight lines parallel to each other (Due to earths magnetic field) Simple Conversions ofCelsius and Fahrenheit Temperature Scales, F to C : Deduct 32, then multiply by 5, then divide by 9, C to F : Multiply by 9, then divide by 5, then add 32, C to F :Add 40, multiply by 9/5, then subtract 40, F to C : Add 40, multiply by 5/9, then subtract 40. The magnetic field lines point from B to A. The section contains questions and answers on conductors, dielectrics and its strengths, polarization and boundary conditions. Draw in your notebook the symbols to represent the following components of electrical circuits: Connecting wires, switch in the OFF position, bulb, cell, switch in the ON position, and battery. Some important properties of magnetic field lines are listed below . The magnetic field is a field produced by the magnet or electric charges in motion. Both of these generators produce electrical power based on the principle of Faradays law of electromagnetic induction.. (d) use of electric meter. You should practice these MCQs for 1 hour daily for 2-3 months. Answer. Types & Advantages, Zero Suppression and Zero Elevation Calculations. In India the potential difference between live wire and neutral wire is The magnetic field is the region around a magnetic material or moving electric charge within which the force of magnetism acts. (d) there are momentary galvanometer deflections that die out shortly; the deflection are in opposite directions. A PLC can be programmed according to the operational requirement of the process. You can refer to NCERT Solutions forClass 10 Science Chapter 13 Magnetic Effects of Electric Current to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams. Electric motor (a) A Electrical Engineering MCQs Need help preparing for your exams? The formulas for converting between degree Celsius and degree Fahrenheit are: To find the temperature when both are equal, we use an old algebra trick and just set F = C and solve one of the equations. Since this matched the arrangement of the other scales then in use (Fahrenheit and Reaumur, mostly Kelvin and Rankine were about a century away still), the proposals were widely accepted and we still use 0 for freezing and 100 for boiling today. When the gauge is unstrained, the bridge is balanced, and voltmeter shows zero value. Electric motor is a device which converts (d) mechanical energy to light energy. Question 6. An electric field is also described as the electric force per unit charge. Feedforward Control with Dynamic Compensation, 4-20mA Junction Box versus Fieldbus (FF) Junction Box, What is a Feedback Control System? The direction of induced current is given by Let us describe this using equations. The fact that they intersected at a whole number is purely coincidental. Swing check valves are available in either Y-pattern or straight body design.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'instrumentationtools_com-box-4','ezslot_15',165,'0','0'])};__ez_fad_position('div-gpt-ad-instrumentationtools_com-box-4-0'); A straight check valve is illustrated in Figure. (b) minimum in the middle MCQ Questions for Class 10 Science with Answers, NCERT Solutions for Class 12 Chemistry Chapter 10 Haloalkanes and Haloarenes, NCERT Solutions for Class 12 English Flamingo Chapter 4 The Rattrap, Childhood Important Extra Questions and Answers Class 11 English Hornbill, NCERT Solutions for Class 10 English First Flight Chapter 9 Madam Rides the Bus, Keeping Quiet Extra Questions and Answers Important Questions Class 12 English Flamingo, Message Writing for Class 5 Format, Examples, Topics, Exercises, Notice Writing Class 8 Format, Examples, Topics, Exercises, Unseen Passage with Questions and Answers, Invitation and Replies Class 12 Format, Examples, Solved CBSE Sample Papers for Class 10 2022-2023 Pdf with Solutions, Concise Mathematics Class 10 ICSE Solutions, () converts electrical energy into mechanical energy, (b) gives the direction of magnetic field around a conductor, (c) converts mechanical energy into electrical energy, (d) gives the direction of force on current carrying conductor placed in magnetic field, (e) the direction of current changes periodically, (f) gives the direction of induced current. Straight body swing check valves contain a disk that is hinged at the top. Question 14. This law states that when a conductor moves in a magnetic field it cuts magnetic lines of force, which induces an electromagnetic force (EMF) in the conductor.. A swing check valve allows full, unobstructed flow and automatically closes as pressure decreases. (a) blue Field lines have both direction and magnitude at any point on the field. All Rights Reserved. Initially the key is not inserted. Select the incorrect statement Mathematically, it can be represented as a vector field which can be plotted as different sets on a grid. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); Solenoid Valves Energized or De-energized State ? By convention the magnetic field lines emerge from pole and merge at pole. The MCQ Test offered by Embibe is curated based on revised CBSE Class Books, paper patterns and syllabus for the year 2021. (d) found to increase from one end to the other. Magnetic field lines are the lines in a magnetic field whose tangent indicates the field direction at any given position and whose density gives the field magnitude. Right hand thumb rule field lines are drawn over the horizontal plane ABCD, the lines are Answer (b) Though the net charge on the conductor is still zero but due to induction negatively charged region is nearer to the rod as Web Butterfly Valves Construction, Types, Stem & Bonnet Assembly, What is a Feedback Control System? (a) the deflection in the galvanometer remains zero throughout. The section contains MCQs on types and properties of waveguides with cut-off frequency and wavelength, traverse electric, magnetic and electric magnetic waves, transients. Now diagnosing the problem becomes much easier with the help of the invention of X-Ray, Ultrasonography, ECG, MRI, Penicillin, etc. In static and balanced power system PLCs play a crucial role in the field of automation, using forming part of a larger SCADA system. The section contains questions and answers on transmission line primary,secondary parameters with equations, power and return loss,standing waves, reflection and transmission coefficients. We hope the given NCERT MCQ Questions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current with Answers Pdf free download will help you. Therefore, magnetic field lines are vectors. These valves are fully closed when the flow reaches zero and prevent back flow. Q is the charge. Answer: (c) straight lines parallel to each other (Due to earths magnetic field). electric field-intensity, density, potential and electrostatic energy and proprties. 4. 6. The section contains multiple choice questions and answers on dot and cross product, vector-position, properties and distance. (a) mechanical energy to electrical energy Magnetic field lines form a closed-loop. In the manufacturing industry, there will be a need for reprogramming due to the change in the nature of production. In the magnetic field, the force exerted by a magnet can be detected using a compass or any other magnet. To understand armature windings in a DC generator, we first need to understand pole pitch, coils, and coil span.. What is Pole Pitch? The compass needle should be placed on a piece of paper near the magnet. The section contains multiple choice questions and answers on advanced, tricky, tough electromagnetic theory. (b) B At any point on the field, field lines have both direction and magnitude. This type of check valve usually has replaceable seat rings. Concentric circles (b) there is a momentary deflection in the galvanometer but it dies out shortly and there is no effect when the keys is removed. 2022 Reproduction without explicit permission is prohibited. (c) A if the current is small, and B if the current is large Magnetic field lines never intersect with each other. The direction of magnetic field at a point will be North to South The current which reverses its direction periodically You can also download the PDF of Electromagnetic Theory MCQs by applying below. (c) at a point located in the plane of the paper, on the north side of the wire The site owner may have set restrictions that prevent you from accessing the site. Reason : Both the Celsius to Fahrenheit and Fahrenheit to Celsius equations are linear (no quadratic terms) implying they are straight lines. Answer: (c) if magnetic field lines are parallel and equidistant, they represent zero field strength. 6. Electricity and electric and electronic equipment plays a vital role in our everyday life. Prop 30 is supported by a coalition including CalFire Firefighters, the American Lung Association, environmental organizations, electrical workers and businesses that want to improve Californias air quality by fighting and preventing wildfires and reducing air pollution from vehicles. As a result of the EUs General Data Protection Regulation (GDPR). (b) magnetic field lines are closed curves Magnetic flux refers to the number of magnetic field lines passing through a closed surface. (d) relative strength of magnetic field is shown by the degree of closeness of the field lines. The electric field strength at P 1 is E 1 and that at P 2 is E 2 If distance between P 1, P 2 is r, then which of the following statement is true? Corona discharge can cause an audible hissing or cracking noise as it ionizes the air around the conductors. Our 1000+ Electromagnetic Theory MCQs (Multiple Choice Questions and Answers) focuses on all chapters of Electromagnetic Theory covering 100+ topics. The current as seen from points A and B (in the plane of paper and on the axis of the coil) is anticlockwise and clockwise respectively. Electric field can be considered as an electric property associated with each point in the space where a charge is present in any form. -. (a) E 1 > E 2 (b) E 1 < E 2 (c) E 2 = rE 1 (d) E 2 = E 1 /r. A swing check valve is normally recommended for use in systems employing gate valves because of the low pressure drop across the valve. Question 3. Casino Royale The Lord of the Rings: The Fellowship of the Ring The Lord of the Rings: The Return of the King The Lord of the Rings: The Two Towers Quantum of Solace Skyfall Die Another Day Star Wars: Episode IV - A New Hope Harry Potter and the Sorcerer's Stone Harry Potter and the Prisoner of Azkaban Dr. No From Russia with Love Thunderball Jurassic Park The section contains multiple choice questions and answers on coulomb and gauss law with applications, electric field-intensity, density, potential and electrostatic energy and proprties. Red. 3. The section contains MCQs on maxwell law 1, 2, 3, 4 and also maxwell law in time static fields as well as time varying fields. Select the correct answer and click on the Finish buttonCheck your score and answers at the end of the quiz, Visit BYJUS for all JEE related queries and study materials, Frequently Asked Questions on Properties of Magnetic Field Lines. (c) 280 V (a) concentric circles Magnetic field in a long solenoid is homogeneous and its strength doesnt depend The direction of this current flow can be Across: These valves are activated by the flowing material in the pipeline. The section contains questions and answers on magnetic force, torque, dipole, materials, energy, circuits and boundary conditions. Why Restriction Orifice is some distance from Blowdown valve ? It is a visual tool used to visualize the direction and the strength of the magnetic field. (c) straight line (b) Flemings left hand rule (c) chemical energy to mechanical energy Move the compass needle to different positions and mark the directions. Composition disks are usually recommended for services where dirt or other particles may be present in the fluid, where noise is objectionable, or where positive shutoff is required. If you would like to learn "Electromagnetic Theory" thoroughly, you should attempt to work on the complete set of 1000+ MCQs - multiple choice questions and answers mentioned above. Magnetic field lines never intersect with each other. -. Question 10. (d) the N- and S-poles exchange position when the direction of current through the solenoid is reversed. Question 11. NCERT Solutions for Class 10 Science Chapter 13 CBSE Free PDF Download. Magnetic fields are represented using magnetic field lines. (c) Right hand thumb rule This way of systematic learning will prepare you easily for Electromagnetic Theory exams, contests, online tests, quizzes, MCQ-tests, viva-voce, interviews, and certifications. The difference between the direct current and alternating current is that the direct current flows in direction, whereas the alternating current its direction periodically. MCQs in all electrical engineering subjects including analog and digital communications, control systems, power electronics, electric circuits, electric machines The total number of lines of force is considered equal to the charge of the object in coulombs. 1. Question 4. (a) Flemings right hand rule You can unsubscribe at any time. C = (C * 9/5) + 32C (C * 9/5) = 32-4/5 * C = 32C = -32 * 5/4C = -40, F = (F * 9/5) + 32F (F * 9/5) = 32-4/5 * F = 32F = -32 * 5/4F = -40. (d) Left hand thumb rule. (a) earthing The sequence impedance varies with the type of power system components under consideration:-. (c) The difference between the direct and alternating currents is that the current always flows in one direction, whereas the alternating current reverses its direction periodically. They denote the direction of the magnetic field. Magnetic field lines can be drawn using a compass needle. At the centre of current carrying loop the magnetic field appears to be a , Across Magnetic field lines appear to emerge or begin at the north pole and terminate at the south pole. Why Thermocouple Reference Junction Compensation Required ? Check the below NCERT MCQ Questions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current with Answers Pdf free download. ON OFF Valve Preventive Maintenance and Testing Procedure, Control Valve Accessories Principle, Purpose, Advantages. (d) The relative strength of the magnetic field is shown by degree of closness of the field lines. Electromagnetic induction 2022 Reproduction without explicit permission is prohibited. Magnetic field in a solenoid formula is given as B = 0 nl. The magnitude of this induced EMF depends upon the rate of change of flux magnetic field in intensity as well as density and also magnostatic energy and its properties. In previous fault calculation, Z 1, Z 2 and Z 0 are positive, negative and zero sequence impedance respectively. Choose the incorrect statement Field lines have both direction and magnitude at any point on the field. The pressure of the fluid passing through the system opens the valve, while any reversal of flow will close the valve. 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