Two identical conductors of copper and aluminium are placed in an identical electric fields. The magnitude of induced charge in the aluminium will be

Options

A. Zero
B. Greater than in copper
C. Equal to that in copper
D. Less than in copper

Answer

To solve the problem of determining the magnitude of induced charge in aluminum when placed in an identical electric field as copper, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Conductors**:
- We have two identical conductors made of copper and aluminum. Both are placed in the same uniform electric field.

2. **Behavior of Free Electrons**:
- Both copper and aluminum are good conductors of electricity, meaning they have free electrons that can move easily within the material. When placed in an electric field, these free electrons will respond to the field.

3. **Induction of Charge**:
- In the presence of an external electric field, the free electrons in both conductors will move towards the positive side of the electric field, causing a separation of charge. This movement results in induced charges on the surfaces of both conductors.

4. **Electric Field Inside Conductors**:
- It is a fundamental property of conductors that the electric field inside a conductor in electrostatic equilibrium is zero. Therefore, the free electrons will redistribute themselves on the surface of the conductors until the electric field inside is zero.

5. **Magnitude of Induced Charge**:
- The amount of induced charge on the surface of a conductor in an electric field depends on the strength of the electric field and the geometry of the conductor. Since both conductors are identical and placed in the same electric field, the magnitude of the induced charge will be the same for both.

6. **Conclusion**:
- Therefore, the magnitude of the induced charge in aluminum will be equal to that in copper.

### Final Answer:
The magnitude of induced charge in aluminum will be equal to that in copper.