Back to ELECTRO MAGNETIC INDUCTION
NEET UG PHYSICS MCQ: ELECTRO MAGNETIC INDUCTION
1
Medium
1 of 1
Analyzing
+4 | -1
Assertion (A): Only a change in magnetic flux will maintain an induced current in a closed coil.
Reason (R): The presence of large magnetic flux through a coil maintains a current in the coil if the coil is continuous.
Reason (R): The presence of large magnetic flux through a coil maintains a current in the coil if the coil is continuous.
View answer and explanation
Correct option: C
Assertion is true but reason is false
Option C (Assertion is true but reason is false) is correct because a change in magnetic flux induces current, but a large constant flux doesn't guarantee current in a continuous coil.
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 . If the current flowing in one is , 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, , then magnetic flux is also zero.
(II)If magnetic flux, 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 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
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 . If the current flowing in one is , 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, , then magnetic flux is also zero.
(II)If magnetic flux, 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 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