###### Electricity

A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R’, then the ratio R/R is –

- 1/25
- 1/5
- 5
- 25

**Solution:**

When a wire of resistance R is cut into five equal parts. The resistance of each part is R/5. Let it be ‘r’. When all these five wires are connected in parallel, the resistance of the combination is given by,