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When an exteranal resistance is connecte...

When an exteranal resistance is connected to a battery of emf 80 V , an ammeter records 200 mA . If A voltmeter is connected to the two ends os the external resistance ,it records 60 V . Determine the rate of supply of energy by theresistance .

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16 W , 12W
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CHHAYA PUBLICATION-ELECTRIC ENERGY AND POWER-Problem Set - I
  1. Ratio of the cross sectional areas of two wires A and B made up of the...

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  2. When an exteranal resistance is connected to a battery of emf 80 V , a...

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  3. An electric bulb is marked 100 w - 230 V . How much energy is produced...

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  4. A current of 5 A flows through an electric press of resistance 44Omega...

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  5. An electric bulb rated for 500 watt at 100 volt is connected to a 200 ...

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  6. Two resistances 2Omega and 6Omega are connected in parallel and the co...

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  7. Two resistances 2Omega and 6Omega are connected in series and the comb...

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  8. If the voltage of supply line drops to 180 V , what will be the power ...

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  9. Two electric lamps marked 110V- 60W and 110V - 100W are connected in ...

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  10. Each of two electric lamps of power 500 W is designed to work in 220 V...

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  11. In a Wheststone bridge P=20 Omega,Q=10Omega,R=10Omegaand S=5Omega. . ...

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  12. An electric heater is marked 110 V - 550 W and it is to be used in 200...

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  13. An electrical circuit contanis an electrical appliance od reasistance ...

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  14. Two wires of same measurements are taken . The ratio of specific resia...

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  15. The ratio of resitance in the fourn arms of a Wheatstone bridge is 3...

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  16. A fuse wire of radius 0.1 mm can withstand a maximum current of 1 A . ...

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  17. Two electric lamps marked 110V- 60W and 110V - 100W are connected in ...

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  18. A 110V -550W hearter is to be used with a 220V mains. What is the mini...

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  19. How many 60 W bulbs may be safely run on 220 v using a 5 A fuse?

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  20. If 10 bulbs of 40 each and 3 of 100w each run on the average for 5 hou...

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