Questions in Current Electricity

SelectQuestion
Which of the following is not a correct statement
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
The energy consumed in 1 kilowatt electric heater in 30 seconds will be
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
A 60 watt bulb carries a current of 0.5 amp. The total charge passing through it in 1 hour is
An electric heater of resistance 6 ohm is run for 10 minutes on a 120 volt line. The energy liberated in this period of time is
Two bulbs are working in parallel order. Bulb A is brighter than bulb B. If ${R_A}$ and ${R_B}$ are their resistance respectively then
Two conductors made of the same material are connected across a common potential difference. Conductor A has twice the diameter and twice the length of conductor B. The power delivered to the two conductors ${P_A}$ and ${P_B}$ respectively is such that ${P_A}/{P_B}$ equals to
A heating coil can heat the water of a vessel from $20^\circ C$ to $60^\circ C$ in 30 minutes. Two such heating coils are put in series and then used to heat the same amount of water through the same temperature range. The time taken now will be (neglecting thermal capacity of the coils)
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

View Selected Questions (0)

Back to Categories

Back to Home