A car moves on a plane road, induced emf produced across the axis is maximum when it

Options

A. Moves at the pole
B. Moves at equator
C. Remain stationary
D. No emf induced at all

Answer

To solve the question regarding when the induced EMF produced across the axis of a moving car is maximum, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Induced EMF**:
- Induced EMF is generated when a conductor (in this case, the car) moves through a magnetic field. The amount of induced EMF depends on the speed of the conductor and the strength of the magnetic field.

2. **Identifying the Motion of the Car**:
- The car is moving on a plain road. We need to consider the orientation of the car in relation to the Earth's magnetic field.

3. **Considering Earth's Magnetic Field**:
- The Earth has a magnetic field that can be approximated as having magnetic field lines that run from the geographic South Pole to the geographic North Pole.

4. **Determining Maximum Induced EMF**:
- The induced EMF will be maximum when the car is moving perpendicular to the magnetic field lines. This occurs when the car is at the poles, where the magnetic field lines are vertical.

5. **Conclusion**:
- Therefore, the induced EMF produced across the axis of the car is maximum when the car is at the poles.

### Final Answer:
The induced EMF produced across the axis of the car is maximum when the car is at the poles.

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