NEET
- Exam
- NEET
- Subject
- Physics
- Chapter
- Electromagnetic Induction
NEET · Physics · Electromagnetic Induction
Given below are two statements: one is labelled as Assertion (A)...
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : A time varying magnetic field induces an electric field.
Reason (R) : An inductor always tends to keep the flux constant.
In the light of the above statements, choose the most appropriate answer from the options given below:
Options
- ABoth (A) and (R) are true and (R) is the correct explanation of (A).
- BBoth (A) and (R) are true and (R) is NOT the correct explanation of (A).
- C(A) is true but (R) is false.
- D(A) is false but (R) is true.
Correct answer
C. (A) is true but (R) is false.
Step-by-step solution
- Assertion (A) states that a time-varying magnetic field induces an electric field. This is a direct consequence of Faraday's Law of Electromagnetic Induction, which states that a changing magnetic flux (often due to a time-varying magnetic field) induces an electromotive force (EMF), and this EMF is associated with an induced electric field. So, Assertion (A) is true.
- Reason (R) states that an inductor always tends to keep the flux constant. While inductors do oppose changes in current (and thus changes in magnetic flux through them) according to Lenz's Law, they do not always keep the flux constant. The flux changes to induce an EMF, and the inductor's role is to oppose this change. If the current is changing, the flux is also changing. So, Reason (R) is false.
Since Assertion (A) is true and Reason (R) is false, the most appropriate answer is (3).
The correct option is (3).