Three capacitors C1 = 2$$\mu$$F, C2 = 6$$\mu$$F and C3 = 12$$\mu$$F are connected as shown in figure. Find the ratio of the charges on capacitors C1, C2 and C3 respectively :
Five identical cells each of internal resistance 1$$\Omega$$ and emf 5V are connected in series and in parallel with an external resistance 'R'. For what value of 'R', current in series and parallel combination will remain the same?
An electric bulb of 500 watt at 100 volt is used in a circuit having a 200 V supply. Calculate the resistance R to be connected in series with the bulb so that the power delivered by the bulb is 500 W.
A
20 $$\Omega$$
B
30 $$\Omega$$
C
5 $$\Omega$$
D
10 $$\Omega$$
Explanation
500 watt at 100 v
P = Vi
500 = Vi
i = 5 Amp
V = i $$\times$$ R
R = 20
Questions Asked from Current Electricity
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