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The heat produced by passing an electric...

The heat produced by passing an electric current through a fixed resistor is proportional to the square of:

A

magnitude of resistance of the resistor

B

temperature of the resistor

C

magnitude of current

D

time for which current is passed

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The correct Answer is:
C
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LAKHMIR SINGH & MANJIT KAUR-ELECTRICITY -Exercise
  1. 100 J of heat are produced each second in a 4 Omega resistance. Find t...

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  2. (a) Derive the expression for the heat produced due to a current 'I' f...

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  3. The heat produced by passing an electric current through a fixed resis...

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  4. The current passing through an electric kettle has been doubled. The h...

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  5. What is an electric fuse? How does it function?

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  6. The elements of electrical heating devices are usually made of:

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  7. The heat produced in a wire of resistance 'x' when a current 'y' flows...

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  8. Which of the following characteristic is not suitable for a fuse wire?

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  9. In a filament type light bulb, most of the electric power consumed app...

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  10. Which of the following is the most likely temperature of the filament ...

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  11. If the current flowing through a fixed resistor is halved, the heat pr...

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  12. The electrical resistivities of four materials P,Q,R and S are given b...

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  13. (a) How does the wire in the filament of a light bulb behave different...

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  14. Two exactly similar heating resistances are connected (i) in series, a...

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  15. Which electric heating devices in your home do you think have resistor...

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  16. What does an electric circuit mean ?

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  17. Define the unit of current.

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  18. Calculate the number of electrons consituting one coulomb of charge.

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  19. Name a device that helps to maintain a potential difference across a c...

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  20. What is meant by saying that the potential difference between two poin...

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