A fuse of rating 5 A can be used for an electric heater is rated 2 kW, 220 V.
True
False
Given:
P = 2 kW
V = 220 V
I = PV
I = 2000 W220 V
I = 9.09 A
So, the fuse of current rating 5 A cannot be used.
What must be the current rating of the fuse for the safe use of an electric heater rated 1188 W, 120 V?
For a fuse rated at 5A, the fuse melts if the current in the circuit exceeds 5A.
Say True or False.
'A fuse is rated 8 A'. Can it be used with an electrical appliance of rating 5 kW, 200 V ?
An electric heater is rated at 2 kW. Electrical energy costs Rs 4 per kWh. What is the cost of using the heater for 3 hours ?
(a) Rs 12
(b) Rs 24
(c) Rs 36
(d) Rs 48