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Priyanka connected two different pieces ...

Priyanka connected two different pieces of material and enclosed them in a box with three. Exterrial connections A, B, Cas shown. She then asked Rekha to guess how the two pieces of material were connected Rekha conducted the following experiments with the black box.

A

B

C

D

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The correct Answer is:
B
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S CHAND IIT JEE FOUNDATION-ELECTRICITY-QUESTION BANK
  1. What constitutes current in a metal wire ?

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  2. The commonly used safety fuse wire is made of

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  3. Priyanka connected two different pieces of material and enclosed them ...

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  4. If we touch a naked current carrying wire, we get a shock. This happen...

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  5. Which of the following is the best conductor of electricity ?

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  6. The metal used in storage batteries is

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  7. The filament of an electric bulb is made of

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  8. The handle of every repairing tool is covered by a certain insulating ...

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  9. Overhead cables need not be insu1ated because

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  10. Look at the two electric circuits using materials A and B as shown bel...

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  11. Safety wire, used in electrical circuits, is made of a material having

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  12. The best conductor of electricity is

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  13. Which of the following statements is true?

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  14. Which of the following cells is rechargeable ?

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  15. Tungsten is used for the manufacture of the filament of an electric bu...

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  16. Conversion of chemical energy into electrical energy occurs in

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  17. A current is passed through a vertical spring from whose lower end a w...

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  18. Lightning conductors are made of

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  19. The acid used in lead storage cells is

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  20. Consider the following statements (1) An isolated electric charge ex...

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