Electrical appliances at home are normally earthed so tha...
Electrical appliances at home are normally earthed so that?
the appliances are maintained at a lower p.d than the earth
both the a.c and d.c sources can be used
a person touching the appliances is safe from electric shock
the appliances are maintained at a higher p.d than the earth
Correct answer is C
Earthing is used to protect you from an electric shock. It does this by providing a path (a protective conductor) for a fault current to flow to earth. It also causes the protective device (either a circuit-breaker or fuse) to switch off the electric current to the circuit that has the fault.
Tea pots are often silver-coated to prevent heat loss by ...
A body of mass 100g moving with a velocity of 10ms-1 collides with a wall. If after collision i...
At what frequency would a capacitor of 2.5μF used in radio circuit have a resistance of 250Ω...
In an a.c circuit that contains only a capacitor, the voltage lags behind the current by ...
An electric charge could be transmitted through ...
The maximum power dissipated by a 100Ω resistor in a circuit is 4W. Calculate the voltage a...