In a torch, the source of electricity is:

1. the bulb
2. the switch
3. the cell
4. the mains

Electricity can flow through:

1. wood
2. rubber
3. plastic
4. copper wire

We should not touch the switch with wet hands, otherwise:

1. electricity may pass through our body
2. electricity may not pass through the appliance
3. circuit may break
4. the switch may get off

The strength of an electromagnet can be increased:

1. by increasing the number of turns in the coil.
2. by decreasing the number of turns in the coil.
3. by inserting a soft iron core in the coil.
4. both increasing the number of turns in the coil and inserting a soft iron core.