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A wire of resistance 12 Omega m^(-1) is ...

A wire of resistance `12 Omega m^(-1)` is bent to from a complete circle of radius `10 cm`. The resistance between its two diametrically opposite points, `A` and `B` as shown in the figure, is

A

`6 Omega`

B

`0.6 pi Omega`

C

`3 Omega`

D

`6 pi Omega`

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The correct Answer is:
B
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MOTION-CURRENT ELECTRICITY-EXERCISE -3 SECTION -A (PREVIOUS YEAR PROBLEMS NEET)
  1. A cell can be balanced against 110 cm and 100 cm of potentiometer wire...

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  2. In the circuit shown, the current through the 4 Omega resistors is 1 a...

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  3. A wire of resistance 12 Omega m^(-1) is bent to from a complete circle...

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  4. See the electrical circuit shown in this figure. Which of the followin...

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  5. A student measures the terminal potential difference (V) of a cell (of...

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  6. A steady current is set up in a metalic wire of non- uniform cross-sec...

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  7. Seven resistance are connected as shown in the firgure. The equivalent...

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  8. Statement-I: The power delivered to a light bulb is more just after it...

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  9. A student measures the terminal potential difference (V) of a cell (of...

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  10. If voltage across a bulb rated 220 V – 100 W drops by 2.5% of its rate...

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  11. The power dissipated in the circuit shown in the figure is 30 W. The v...

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  12. A ring is made of a wire having a resistance R(0) = 12 Omega. Find the...

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  13. 6Omega and 12Omega resistors are connected in parallel. This combinati...

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  14. Charge passing through a conductor of cross-section area A=0.3 m^2 is...

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  15. A cell having an emf E and internal resistance r is connected across a...

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  16. In the circuit shown the cells A and B have negligible resistance. For...

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  17. A current of 2 A flows through a 2 Omega resistor when connected acros...

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  18. The resistance t R of a conductor varies with temperature t as shown ...

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  19. A 100 V voltmeter of internal resistance 20 k Omega n series with a hi...

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  20. A,B and C are voltmeters of resistance R, 1.5 R and 3R respectively as...

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