How much deflection is produced in a galvanometer attached to a coil, if a bar magnet is kept stationary near coil?

Answer

To solve the question, "How much deflection is produced in a galvanometer attached to a coil if a bar magnet is kept stationary near the coil?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Electromagnetic Induction**:
- Electromagnetic induction occurs when there is a change in the magnetic flux linked with a coil, which induces an electromotive force (EMF) in the coil.

2. **Identify the Situation**:
- In this scenario, we have a bar magnet placed stationary near a coil that is connected to a galvanometer.

3. **Analyze the Motion**:
- Since the bar magnet is stationary and not moving, there is no change in the magnetic field around the coil. The magnetic flux linked with the coil remains constant.

4. **Apply Faraday's Law of Induction**:
- According to Faraday's law, EMF is induced in a coil only when there is a change in magnetic flux. Mathematically, it can be expressed as:
\[ \text{EMF} = -\frac{d\Phi_B}{dt} \]
- Here, \(\Phi_B\) is the magnetic flux. If there is no change in flux (\(d\Phi_B/dt = 0\)), then the induced EMF is zero.

5. **Conclusion about Galvanometer Deflection**:
- Since there is no induced EMF due to the stationary position of the bar magnet, there will be no current flowing through the coil. Consequently, the galvanometer will show no deflection.

### Final Answer:
The deflection produced in the galvanometer is **zero**.

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