When a magnetic is moved with its N pole away from the coil, then the nearer face of the coil behaves as a

Options

A. N-pole
B. S-pole
C. `+ve` charge
D. `-ve` charge

Answer

To solve the question, we need to analyze the situation where a magnet is moved away from a coil, specifically focusing on the behavior of the nearest face of the coil. Here's the step-by-step solution:

### Step 1: Understand the Setup
We have a magnet with a north pole (N) and a south pole (S). The north pole is facing a coil, and we are moving the magnet away from the coil.

**Hint:** Visualize the magnetic field lines emanating from the north pole of the magnet.

### Step 2: Determine the Effect of Moving the Magnet
When the north pole of the magnet is moved away from the coil, the magnetic field lines that were passing through the coil will decrease. This is because the distance between the magnet and the coil increases.

**Hint:** Remember that the magnetic flux through the coil is related to the strength of the magnetic field and the area of the coil.

### Step 3: Analyze Magnetic Flux
As the magnet moves away, the magnetic flux (Φ) through the coil decreases. According to Faraday's law of electromagnetic induction, a change in magnetic flux induces an electromotive force (EMF) in the coil.

**Hint:** Recall that magnetic flux (Φ) is given by the product of the magnetic field (B) and the area (A) through which it passes.

### Step 4: Apply Lenz's Law
Lenz's law states that the direction of the induced current will be such that it opposes the change in magnetic flux. Since the flux is decreasing (due to the magnet moving away), the coil will induce a current that tries to increase the flux.

**Hint:** Think about how the coil can increase the magnetic flux through it.

### Step 5: Determine the Polarity of the Coil's Nearest Face
To oppose the decrease in magnetic flux, the nearest face of the coil must behave like a south pole. This is because a south pole will attract the north pole of the magnet, attempting to pull the magnet closer and thereby increasing the magnetic flux through the coil.

**Hint:** Consider how magnetic poles interact: north attracts south and repels north.

### Conclusion
Therefore, when the north pole of the magnet is moved away from the coil, the nearest face of the coil behaves as a south pole.

**Final Answer:** The nearest face of the coil behaves as a south pole.