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Physics 10 Chapter 15 - Electromagnetism - 11
1.
Which of the following law states that: "The direction of an induced current in a circuit is always such that it opposes the cause that produces it"?
a) Henry's law
b) Ampere's law
c) Lenz's law
d) Faraday's law
2.
Lenz’s law is a manifestation of the law of........................?
a) Conservation of charge
b) Conservation of energy
c) Conservation of mass
d) Conservation of momentum
3.
The direction of induced e.m.f. in a circuit is in accordance with conservation of........................?
a) Energy
b) Charge
c) Mass
d) Momentum
4.
If a coil is rotated in a magnetic field, what is induced in it?
a) Mutual induction
b) Magnetism
c) Magnetic field
d) Electric current
5.
Upon which of the following factor, the current induced due to rotation of coil in a magnetic field depends?
a) Upon the angle between them
b) Upon strength of external magnet
c) Upon the force between them
d) Upon number of magnetic lines of force
6.
When would be the number of lines of magnetic force passing through the coil maximum?
a) When plane of coil is at 45° angle to magnetic lines
b) When plane of coil is at 60° angle to magnetic lines
c) When plane of coil is perpendicular to magnetic lines
d) When plane of coil is parallel to magnetic lines
7.
When would be the number of lines of magnetic force passing through the coil minimum?
a) When plane of coil is parallel to magnetic lines
b) When plane of coil is at 45° angle to magnetic lines
c) When plane of coil is perpendicular to magnetic lines
d) When plane of coil is at 60° angle to magnetic lines
8.
When would be the number of lines of magnetic force passing through the coil zero?
a) When plane of coil is at 45° angle to magnetic lines
b) When plane of coil is perpendicular to magnetic lines
c) When plane of coil is parallel to magnetic lines
d) When plane of coil is at 60° angle to magnetic lines
9.
To convert which energy into electrical energy, a generator inside a hydroelectric dam uses electromagnetic induction?
a) Electric potential energy of spinning turbine
b) Sound energy of spinning turbine
c) Gravitational energy of spinning turbine
d) Mechanical energy of spinning turbine
10.
Who devised a rule to find out the direction of a current induced in a circuit?
a) Lenz
b) Faraday
c) Henry
d) Ampere
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