NEET UG PHYSICS MCQ: ELECTRO MAGNETIC INDUCTION

1 Medium

1 of 1

Analyzing +4 | -1

Assertion : The mutual inductance of two coils is doubled if the self inductance of the primary
or secondary coil is doubled.

Reason : Mutual inductance is proportional to the self inductance of primary and secondary
coils.

View answer and explanation

Correct option: C

If Assertion is True but the reason is false

Option C is correct. The assertion is true; doubling either self-inductance doubles mutual inductance. However, the reason is false; mutual inductance is proportional to the square root of the product of self-inductances, not directly proportional to each.

More Questions from ELECTRO MAGNETIC INDUCTION

Practice All Chapter MCQs →

Assertion (A): Whenever the magnetic flux linked with a closed coil changes there will be an induced emf as well as an induced current.

Reason (R): According to Faraday, the induced emf is inversely proportional to the rate of change of magnetic flux linked with a coil. The coefficient of mutual inductance of two coils is

6\,\,mH

. If the current flowing in one is

2\,\,ampere

, then the induced e.m.f. in the second coil will be The induced emf cannot be produced by: Consider the statements:
(I)If magnetic field,

\mathrm{B = 0}

, then magnetic flux is also zero.
(II)If magnetic flux,

\phi = 0,

then magnetic field is also zero. The coefficient of self inductance of a solenoid is 0.18 mH. If a rod of soft iron of relative permeability 900 is inserted, then the coefficient of self inductance (in mH ) will become nearly: A uniformly wound solenoidal coil of self inductance

1.8 \times {10^{ - 4}}

H and resistance 6 Ω is broken up into two identical coils. These identical coils are then connected in parallel across a 12 V battery of negligible resistance. The time constant of the current in the circuit 