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Write the reletion between resistance R ...

Write the reletion between resistance R of the filament of a bulb, its power and a constant voltage V applied across it.

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`R = V^2 /P`
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KUMAR PRAKASHAN-ELECTRICITY-OBJECTIVE QUESTIONS AND ANSWERS (Answer the following questions as directed (Miscellaneous):)
  1. On what principle is an electric bulb based?

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  2. In a circuit, two resistors of resistances 5 Omega and 10 Omega are co...

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  3. Write the reletion between resistance R of the filament of a bulb, its...

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  4. Which of the following bulbs has more resistance? (a) A 220V, 100W b...

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  5. Find the minimum resistance that can be made using five resistors, eac...

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  6. How does the resistance (R) of a wire depend upon its radius (r)?

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  7. An ammeter has a range (0 - 3A) and there are 30 divisions on its scal...

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  8. In a voltmeter there are 20 divisions between 0 mark and 0.5 V mark....

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  9. To verify the Ohm.s law a circuit diagram was drawn by a student as sh...

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  10. Four students connect 4 cells of 1.5 V each to get a battery of voltag...

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  11. Which of the following statements is correct? (a) one volt is one j...

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  12. Keeping the resistance constant, the potential difference applied acro...

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  13. Keeping the potential difference constant, the resistance of a circuit...

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  14. A potential difference of 10 V is needed to make a current of 0.02 A f...

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  15. A current of 200 mA flows through a 4 kOhm resistor. What is the poten...

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  16. The electrical resistivities of four materials A, B, C and D are given...

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  17. The equivalent resistance of a series combination of two resistors is ...

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  18. An electric lamp is labelled 12 V, 36 W. This indicate that it should ...

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  19. Name two devices whose working is based on the heating effect of elect...

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  20. Name the gases which are filled into the filament-type electric light ...

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