What name is given to the following arrangement ?
A coil of insulated copper wire wrapped around an iron piece and connected to an electric cell.

Answer

To solve the question, we need to identify the name given to the arrangement described: a coil of insulated copper wire wrapped around an iron piece and connected to an electric cell.

### Step-by-Step Solution:

1. **Understanding the Components**:
- We have a coil of insulated copper wire. The insulation is important as it prevents short circuits.
- The coil is wrapped around an iron piece, which is a ferromagnetic material.

2. **Connection to Electric Cell**:
- The coil is connected to an electric cell, which provides the electric current needed for the operation of the arrangement.

3. **Current Flow**:
- When the electric cell is connected, and the circuit is closed (if there is a switch involved), electric current flows through the copper wire.

4. **Magnetic Effect**:
- As the current flows through the coil, it generates a magnetic field around the wire. Since the wire is wrapped around an iron piece, this magnetic field magnetizes the iron.

5. **Naming the Arrangement**:
- The arrangement of a coil of wire wrapped around an iron core, which behaves like a magnet when electric current passes through it, is known as an **electromagnet**.

### Final Answer:
The name given to the arrangement is **electromagnet**.

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