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प्रश्न
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उत्तर
P = VI = I2 R = `"V"^2/"R"`
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संबंधित प्रश्न
An electric bulb is rated ‘100 W, 250 V’. What information does this convey?
A current of 0.2 A flows through a wire whose ends are at a potential difference of 15 V.
calculate:
(i) the resistance of the wire and
(ii) the heat energy produced in 1 minute.
An electric bulb marked 220 V, 100 W will get fused if it is made to consume 150 W or more. What voltage fluctuation will the bulb withstand?
Define 1 kilowatt hour.
An electric iron rated 750 W is operated for 2 hours/day. How much energy is consumed by the electric iron for 30 days?
Which cable, one rated 15A and the other rated 5A will be thicker? Give a reason.
Point out two main disadvantages of ‘Tree System’.
An electric bulb is marked 100 W, 230 V. What does this mean?
An electric bulb is rated 240V-60W and is working at 100% efficiency.
(i) Calculate the resistance of bulb.
(ii) (a) Draw the circuit diagram.
(b) What is the rate of conversion of energy in each bulb?
(c) Total power used by the bulbs.
1 kWh = ____________
