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On 220 V supply, a heater heats a volume...

On 220 V supply, a heater heats a volume of water in 5 minutes time. On the supply of 110 V, the same heater will heat the same volume of water in

A

5 minutes

B

8 minutes

C

10 minutes

D

20 minutes

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MODERN PUBLICATION-TEXTUAL QUESTIONS-EXERCISE
  1. If a power of 100 W is being supplied across a potential difference of...

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  2. A 10Omega electric heater operates on a 110 V line. The rate at which ...

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  3. On 220 V supply, a heater heats a volume of water in 5 minutes time. O...

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  4. Two heater coils separately take 10 minutes and 5 minutes to boil a ce...

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  5. Five equal resistors, when connected in seires, dissipated 5 W power, ...

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  6. If a wire of resistance 20 Omega is overed with ice and a voltage of 2...

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  7. A wire is cut into 4 pieces, which are put together by sides to obtain...

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  8. A student has 10 resistors each of resistance r, From the given resist...

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  10. The internal resistance of a cell is the resistance of

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  11. The internal resistance of a cell of e.m.f. 2 V is 0.1 Omega. It is co...

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  12. A battery of e.m.f. 10V and internal resistance 3 Omega is connected t...

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  15. For driving current of 2A for 6 min in a circuit, 1,000 J of work is t...

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  16. Two batteries of e.m.f. 4V and 8V with internal resistances 1 Omega an...

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  17. To draw maximum current from a combination of cells, how should the ce...

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  18. Current provided by a battery is maximum, when

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  19. kirchoff's first and second laws are respectively based on law of cons...

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