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138
State whether an electric heater will consume more electrical energy or less electrical en...
By Satkriti Roao, 4 years ago
replies 1
0
1
204
What is meant by “electric power”? Write the formula for electric power in terms of potent...
By Satkriti Roao, 4 years ago
replies 1
0
1
479
An electric fan runs from the 230 V mains. The current flowing through it is 0.4 A. At wha...
By Satkriti Roao, 4 years ago
replies 1
0
1
466
What is the maximum power in kilowatts of the appliance that can be connected safely to a ...
By Satkriti Roao, 4 years ago
replies 1
0
1
319
A 2 kW heater, a 200 W TV and three 100 W lamps are all switched on from 6m. to 10 p.m. Wh...
By Satkriti Roao, 4 years ago
replies 1
0
1
475
An electric kettle connected to the 230 V mains supply draws a current of 10 A. Calculate ...
By Satkriti Roao, 4 years ago
replies 1
1
1
363
Two lamps, one rated 40 W at 220 V and the other 60 W at 220 V, are connected in parallel ...
By Satkriti Roao, 4 years ago
replies 1
0
1
301
Calculate the power used in the 2 Ω resistor in each of the following circuits : (i) a 6 V...
By Satkriti Roao, 4 years ago
replies 1
0
1
182
Which uses more energy a 250 W TV set in 1 hour or a 1200 W toaster in 10 minutes?
By Satkriti Roao, 4 years ago
replies 1
1
1
168
An electric motor takes 5 amperes current from a 220 volt supply line. Calculate the power...
By Satkriti Roao, 4 years ago
replies 1
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