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A resistance of 2Omega is connected acro...

A resistance of `2Omega` is connected across one gap of a meter bridge (the length of the wire is `100 cm`) and an unknown resistance, greater than `2Omega`is conneted across the other gap. When these resistances are interchanged, the balance point shifts by `20 cm`. Neglecting any corrections,the unknown resistance is

A

`3 Omega`

B

`4 Omega`

C

`5 Omega`

D

`6 Omega`

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The correct Answer is:
A
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RESONANCE-CURRENT ELECTRICITY-Exrcies-3(PART-1)
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  3. Figure shows three resistor configurations R1,R2 and R3 connected to 3...

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  8. To verify Ohm's law, a student is provided with a test resistor R(T), ...

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  9. When two identical batteries of internal resistance 1Omega each are co...

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  10. Two batteries of different emfs and different internal resistances are...

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  11. For the resistance network shown in the figure, choose the correct opt...

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  12. Heater of an electric kettle is made of a wire of length L and diamete...

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  13. Two ideal batteries of emf V(1) and V(2) and three resistance R(1)R(2)...

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  14. A galvanometer gives full scale deflection with 0.006 A current. By co...

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  15. During an experiment with a metre bridge, the galvanometer shows a nul...

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  16. In an aluminium (Al) bar of square cross section, a square hole is dri...

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  17. In the following circuit, the current through the resistor R (=2Omega)...

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  18. An infinite line charge of uniform electric charge density lambda lies...

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  19. Consider two identical galvanometers and two identical resistors with ...

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