Electricity

Sources of electricity are

• generator

• cell

• solar cell

• all the above

1 kWh =

• 10 units

• 2 units

• 3 unit

• 1 unit

safety devices are

• MCB

• fuse

• switch

• both (a) and (b)

Live wire is ______ in colour

• blue

• black

• red

• green

Fuse is based on

• melting of wire

• cooling of current

• wiring

• heating effect of current

The earth wire carries

• 220 V

• 110 V

• 100 V

• no current

Fuse is an alloy of __________ and __________

Fuse wire has

• low melting point

• high melting point

• high resistance

• both a and c

Fuse wire is connected in _______ with live wire

• parallel

• series

Resistance depends on

• Area of cross section

• length of the conductor

• resistivity of material

• all the above