Can we use galvanometer to measure alternating current ?

Explanation

To determine whether a galvanometer can be used to measure alternating current (AC), we can analyze the working principle of the galvanometer and the nature of AC.

### Step-by-Step Solution:

1. **Understanding the Galvanometer**:
- A galvanometer is an instrument that measures small electric currents. It operates based on the principle of torque acting on a coil placed in a magnetic field. The deflection of the needle is proportional to the current flowing through the coil.

2. **Current Types**:
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