CBSE Class 10 Science Electricity Quiz 2

1. The variable resistance is called

A resistor B rheostat C open switch D none of these

2. The SI unit of resistance is

A ohm m B ohm m C ohm D (ohm)

3. An electric iron draws a current 4 A when connected to a 220 V mains. Its resistance must be

A 1000 Ω B 55 Ω C 44 Ω D None of these

4. The element used almost exclusively for filaments of incandescent lamps

A copper B gold C silver D tungsten