Electromagnetic Induction MCQ

Electromagnetic Induction MCQ are formed as per the latest exam pattern. Chapter 6 Electromagnetic Induction MCQs include concepts of the magnetic field, Faraday’s laws, conductor, and electromotive force.

Electromagnetic induction is a process by which electromotive force is generated, due to the interaction between the conductor and a magnetic coil. The force is generated when at least one of them is in motion, either the conductor or the magnetic field. According to Faraday, an electromotive force will be generated, if a stationary magnet is kept in a moving magnetic field, or if the magnetic field is kept constant, and the conductor is moved. The formula to determine the electromagnetic induction is:

e = N × dΦ / dt

Here,

• e = the induced voltage (volts)
• N = number of circular twists and turns in the coil
• Φ = magnetic flux (Webers)
• t = time (seconds)

Read More: NCERT Solutions for Class 12 Physics Chapter 6 Electromagnetic Induction

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Electromagnetic Induction MCQ

Question 1: The emf induced in the circuit when the magnetic flux associated with an electric circuit changes is known as:

1. electromagnetic induction
2. lenz’s law
3. hysteresis loss
4. Kirchhoff laws

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Question 2: The EMI induced is independent of which of the following factors:

1. change of flux
2. time.
3. resistance of the coil
4. None of these

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Question 3: Magnets produce induced e.m.f. when inserted into coils. The strength of the induced e.m.f. is independent of the:

1. the strength of the magnet
2. number of turns of coil
3. the resistance of the wire in the coil
4. speed with which the magnet is moved

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Question 4: The electromagnetic induction is ____ according to the Faraday's law of electromagnetic induction:

1. an electric field is produced by time varying magnetic flux.
2. a magnetic field is produced by time varying electric flux.
3. a magnetic field is associated with a moving charge.
4. None of these

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Question 5: The induced e.m.f. of a moving conductor coil can be measured using the following law:

1. Lenz's law
2. Faraday’s law
3. Coulomb’s law
4. Ampere’s law

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Question 6: When an insulated wire coil is connected to a battery, the pointer of the galvanometer is deflected due to:

1. the induced current produced
2. the coil acts like a magnet
3. the number of turns in the coil of the galvanometer is changed
4. None of these

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Question 7: Polarity of the induced emf is determined by:

1. Ampere’s circuital law
2. Biot–Savart law
3. Lenz’s law
4. Fleming’s right-hand rule

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Question 8: A coil's self-inductance is a measure of its:

1. electrical inertia
2. electrical friction
3. induced e.m.f.
4. induced current

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Also Read:

Question 9: In resistance boxes, the coils are made from doubled-insulated wires to eliminate the effect of:

1. heating
2. magnetism
3. pressure
4. self-induced e.m.f.

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Question 10: A series connection of two pure inductors each of self-inductance L yields a net inductance of:

1. L
2. 2 L
3. L/2
4. L/4

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Previous Year Questions

Questions on Lenz Law 

1. Lenz’s law is consequence of the law of conservation of….. [UPSEE 2019]
2. The magnetic field is increasing at a constant rate. The directions of induced current in wires AB and CD  are…. [VITEEE 2019]
3. the circular loop of wire is moved with velocity towards the infinite current carrying wire…… [VITEEE 2016]
4. Two identical coaxial coils P and Q  carrying equal amount of current in the same direction are brought nearer. The current in...[KEAM]
5. The polarity of induced emf is given by….[KEAM]

Questions on Electromagnetic Induction

1.  If a transformer of an audio amplifier has output impedance 8000 0 and the speaker has input impedance…...[JCECE 2005]
2. A conducting loop in the shape of a right angled isosceles triangle of height 10cm10cm is kept such that the 90^∘ vertex is…..[JEE Advance 2016]
3. A 10m long horizontal wire extends from North East to South West. It is falling with a speed of 5.0ms⁻¹……. [ JEE Main 2019]
4. If a current of 2.0A2.0A flows through the smaller loop, then the flux linked with bigger loop is…… [JEE Main 2013]
5. A coil of cross-sectional area A having n turns is placed in a uniform magnetic field B….. [JEE Main 21018]
6. A copper rod of mass m slides under gravity on two smooth parallel rails, with separation ll and set at an angle of θ with the horizontal….. [JEE Main 2018]
7. A copper wire is wound on a wooden frame, whose shape is that of an equilateral…. [JEE Main 2019]
8. A metallic rod of length ll is tied to a string of length 2l and made to rotate with angular speed…. [JEE Main 2013]
9. A square frame of side 10 cm and a long straight wire carrying current 1 A are in the plane of the paper…. [JEE Main 2014]
10. If the rod makes n rotations per second, then the time averaged magnetic moment of the rod is… [JEE Main 2019]
11. Figure shows a circular area of radius R where a uniform magnetic field….
12. In a coil of resistance 100Ω , a current is induced by changing the magnetic flux through it….. [JEE Main 2017]
13. When current in a coil changes from 5A  to 2A…. [JEE Main 2015]

Questions on Faradays laws of induction

1. Two identical circular coils A and B are kept on a horizontal tube side by side without touching each other…. [KCET 2013]
2. The magnetic flux through a circuit of resistance RR changes by an amount….[NEET 2004]
3. A conducting loop in the shape of a right angled isosceles triangle of height...[JEE Advance 2016]
4. If a transformer of an audio amplifier has output impedance…..[JCECE]

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