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प्रश्न
How does the heat produced by die passage of current in a metallic wire depend on the resistance of the wire.
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उत्तर
The heat produced is proportional to the resistance of the wire.
संबंधित प्रश्न
Which uses more energy: a 250 W TV set in 1 hour or a 1200 W toaster in 10 minutes?
Calculate the resistance of an electric bulb which allows a 10 A current when connected to a 220 V power source.
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?
An Electric bulb is marked 100 W, 230 V. What current does it take?
A battery of e.m.f. 12V and internal resistance 1.6 Ω is connected to two resistors of 4Ω and 6Ω connected in parallel. Calculate:
(i) the current drawn from the battery,
(ii) the power dissipated in each resistor,
(ii)the total power supplied by the battery.
The following table gives the electrical appliances used, their power and the average time for which they are used each day in a home. Estimate the monthly electricity bill if the rate is 60 paise per unit.
| Sr.no. | Name | Nos. | Power rating | Time/day |
| 1 | Bulb | 4 | 100 W | 7.5 hr |
| 2 | Fans | 2 | 50 W | 10 hr |
| 3 | T.V. | 1 | 100 W | 2 hr |
| 4 | Iron | 1 | 500 W | 1 hr |
| 5 | Electric stove | 1 | 750 W | 2 hr |
Unit of electric power may also be expressed as:
1 kWh is equal to:
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A conductor of 10 Ω is connected across a 6 V ideal source. The power supplied by the source to the conductor is ______.
