Question

Two coils of copper wire are placed closer to each other. Due to change in the value of current in one coil, current starts to flow in the other coil. Reason for this phenomenon is -

• A. Electric induction
• B. Magnetic induction
• C. Mutual induction
• D. Self-induction

Hint:

Mutual induction is the process where a changing current in one coil induces a current in a nearby coil. This principle is fundamental in devices like transformers.

Answer 1

The Correct Option is C

Step 1: Understanding the problem
We are dealing with two coils placed close to each other, and the change in current in one coil induces a current in the other coil. This process is known as induction, and it depends on the interaction between the magnetic fields produced by the changing currents in the coils.

Step 2: Explaining mutual induction
When two coils are placed near each other, a changing current in the first coil creates a changing magnetic field. This changing magnetic field then induces a current in the second coil. This phenomenon is known as mutual induction, where one coil induces a current in the other due to the varying magnetic field.

Step 3: Why the other options are incorrect
- (A) Electric induction: Electric induction generally refers to the generation of electric charge in response to an external electric field, not related to the magnetic field changes as described here. - (B) Magnetic induction: Magnetic induction is related to the process of generating a magnetic field in response to an electric current, but in this case, we are describing how a changing magnetic field induces current in another coil, which is mutual induction. - (D) Self-induction: Self-induction occurs when a changing current in a coil induces a voltage in the same coil, not in another coil.
Thus, the correct answer is option (C) Mutual induction.