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In an electrical circuit two resistors o...

In an electrical circuit two resistors of 2 ohm and 4 ohm espectively are connected in series to a 6 V battery. The heat dissipated by the 4 ohm resistor in 5 s will be

A

5 J

B

10 J

C

20 J

D

30 J

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MODERN PUBLICATION-ELECTRICITY-EXERCISE
  1. A cylindrical conductor of length l and uniform are of cross section A...

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  2. The resistivtiy does not change if

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  3. In an electrical circuit two resistors of 2 ohm and 4 ohm espectively ...

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  4. A number of cells when connected in series from

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  5. In a voltmeter there are 20 divisin between the 0 mark and 0.5 V mark....

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  6. Which of the following statements does not represent ohm's law?

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  7. True or false The resistance of ammeteer is very high.

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  8. True or false In a circuit resistance is doubled the current to half.

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  9. True or false Germanium is a substance whose resistance decreases with...

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  10. True or false A bird perched on a high voltage wire is killed by the c...

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  11. True or false Volt is represented by joule/coulomb.

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  12. Fill ups Among silver and copper……………is a better conductor.

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  13. Resistance of a conductor depends on:

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  14. Fill ups The current through a lamp of 25 W operating at 200 V is……………...

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  15. Fill ups Lead tin alloy is used for making fuse because it has…………..me...

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  16. Fill ups Nicrhome is used for making element because it has……………meltin...

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  17. What is the current flowing in the given electric circuit?

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  18. A wire of resistivity rho is stretched to double its length. Then its ...

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  19. How many electrons make 10C of charge?

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  20. Three 60 W incandescent buolbs are connected in a parallel. Calculate ...

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