Questions asked
Vivek K
Numerade educator
Electric room radiator which operates at 225 volts has resistance of 50 ohms. Power of the radiator is approximately
Two resistors of 6Ω and 9Ω are connected in series to a 120 volt source. The power consumed by the 6Ω resistor is
A 5°C rise in temperature is observed in a conductor by passing a current. When the current is doubled the rise in temperature will be approximately
An electric lamp is marked 60 W, 230 V. The cost of 1 kilowatt hour of power is Rs. 1.25. The cost of using this lamp for 8 hours is
If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be
A 60 watt bulb carries a current of 0.5 amp. The total charge passing through it in 1 hour is
Two bulbs of 500 watt and 200 watt are manufactured to operate on 220 volt line. The ratio of heat produced in 500 W and 200 W, in two cases, when firstly they are joined in parallel and secondly in series, will be
Three light bulbs of 40 W, 60 W and 100 W are connected in series with 220 V source. Which one of the bulbs will glow brightest
A heating coil is labelled 100 W, 220 V. The coil is cut in half and the two pieces are joined in parallel to the same source. The energy now liberated per second is
The internal resistance of a primary cell is 4 ohm. It generates a current of 2 amp in an external resistance of 21 ohm. The rate at which chemical energy is consumed in providing the current is