AD-V, I and R – Exercise

A 250V bulb passes a current of 0.3A. Calculate the power in the lamp

75 W

50 W

25 W

90 W

Resistance of 220 V, 100 W lamp will be

4.84 Ohm

0.48 Ohm

48.4 Ohm

4840 Ohm

If the resistance of an electric bulb is 500 Ω and voltage across its ends is 250 V then power consumed by it is

130 W

125 W

120 W

200 W

When the current through a 12 kΩ resistor is 8 mA, the power is

7.68 mW

768 mW

7.68 W

76.8 W

If Two bulbs of 500W and 200 W rated at 250 V will have resistance ratio as

4: 25

25: 4

2: 5

5: 2

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