Electromagnetic Induction Test

Result

Electromagnetic Induction Test - 8

Score
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Rank
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TIME Taken - -

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Question 1
1 / -0

Induced currents always produce expanding magnetic fields around their conductors in a direction that opposes the original magnetic field. This law is called

A
Lenz's law

B
Fleming's law

C
Ohm's law

D
Kirchhoff's law

Solution

Induced currents always produce expanding magnetic fields around their conductors in a direction that opposes the original magnetic field. This law is called Lenz's law. Lenz's law states that the direction of an induced e.m.f. will be such that if it were to cause a current to flow in a conductor in an external circuit, then that current would generate a field that would oppose the change that created it.
Question 2
1 / -0

If a coil of metal wire is kept stationary in a non-uniform magnetic field, then

A
emf as well as current is induced in the coil

B
current, but no emf is induced in the coil

C
emf, but no current is induced in the coil

D
neither emf nor current is induced in the coil

Solution

If a coil is not moved in a magnetic field, the magnetic flux does not change. Hence, no emf or current is induced in the coil. So, the correct choice is (4).