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1. Which of the following factors is the induced charge in an electromagnetic induction independent of?

a.Time
b.Resistance of the coil
c.Change of flux
d.None of the above
Answer: (a) Time

2. Which of the following states that an emf is induced whenever there is a change in the magnetic field linked with electric circuits?

a.Lenz’s Law
b.Ohm’s Law
c.Faraday’s Law of Electromagnetic Induction
d.None of the above
Answer: (c) Faraday’s Law of Electromagnetic Induction

3. Which of the following gives the polarity of the induced emf?

a.Biot-Savart Law
b.Lenz’s Law
c.Ampere’s circuital Law
d.Fleming’s right-hand Rule
Answer: (b) Lenz’s Law

4. Electrical Inertia is the measure of

a.Self Inductance
b.Mutual Inductance
c.Impedance
d.None of the above
Answer: (a) Self Inductance

5. Which of the following laws is the consequence of the Law of conservation of energy?

a.Lenz’s Law
b.Ohm’s Law
c.Archimedes Law
d.All of the above
Answer: (a) Lenz’s Law

6. Which of the following apparatus construction uses electromagnetic induction?

a.Voltmeter
b.Galvanometer
c.Generator
d.Electric Motor
Answer: (c) Generator

7. Which of the following factors is the self inductance associated with a coil is independent of?

a.induced voltage
b.current
c.time
d.coil resistance
Answer: (d) coil resistance

8. Which of the following rules is used to identify the direction of the current induced in a wire moving in a magnetic field?

a.Ampere’s Rule
b.Fleming’s Left-Hand Rule
c.Fleming’s Right-Hand Rule
d.None of the above
Answer: (b) Fleming’s Left-Hand Rule

9. Which of the following statements is true?

a.A metal plate can be heated by passing either a direct current or an alternating current through the plate.
b.A metal plate can be heated by placing it in a time-invariant magnetic field.
c.A metal plate can be heated by placing it in a time-variant magnetic field
d.Both (a) and (c)
Answer: (d) Both (a) and (c)

10. The induced emf is equal to the coefficient of self-inductance is equal to unity, when the rate of change of current is unity.

a.True
b.False
Answer: (a) True

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1. What did Rutherford’s alpha particle experiment prove?

a.Electrons
b.Protons
c.Neutrons
d.Nucleus
Answer: (d) Nucleus

2. Why was Rutherford’s atomic model unstable?

a.Electrons do not remain in orbit.
b.Nuclei will break down.
c.The nucleus repels electrons.
d.Orbiting electrons radiate energy.
Answer: (a) Electrons do not remain in orbit.

3. Balmer series lies in which spectrum?

a.Ultraviolet
b.Visible
c.Infrared
d.Partially Visible
Answer: (b) Visible

4. According to the classical theory, the circular path of the electrons is ?

a.Circular
b.Parabolic
c.Spiral
d.Straight line
Answer: (c) Spiral

5. Electrons in the atom are held to the nucleus by ?

a.Nuclear Force
b.Coulomb’s Force
c.Gravitational Force
d.Van Der Waal’s Force
Answer: (b) Coulomb's Force

6. The electrons of Rutherford’s model would be expected to lose energy because?

a.They jump on the nucleus
b.They move randomly
c.Radiate electromagnetic waves
d.Escape from the atom
Answer: (c) Radiate electromagnetic waves.

7. Who discovered the first spectral series?

a.Lyman
b.Balmer
c.Paschen
d.Pfund
Answer: (b) Balmer

8. Which of the following did Bohr use to explain his theory?

a.Quantization of angular momentum
b.Conservation of Quantum frequency
c.Conservation of Mass
d.Conservation of Linear Momentum
Answer: (a) Quantization of angular momentum

9. The significant result deduced from Rutherford’s scattering experiment is that?

a.the whole of the positive charge is concentrated at the center of an atom
b.there are neutrons inside the nucleus
c.α-particles are hydrogen nuclei
d.electrons are embedded in the atom
Answer: (a) the whole of the positive charge is concentrated at the center of an atom.

10. The first model of the atom was proposed by ?

a.Neils Bohr
b.Albert Einstein
c.J.J Thompson
d.Ernest Rutherford
Answer: (c) J.J Thompson

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