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In the shown arrangement of the experiment of the meter bridge if AC corresponding to null deflection of galvanometer is x, what would be its value if the radius of the wire AB is doubled?

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The correct Answer is:
`vec(v)_(c ) = -vec(v)_(B)`
COLM : implies that `vec(v)_(C )` & `vec(v)_(B)` are opposite to each other.
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In the shows arrangement of a meter bridge, if AC corresponding to null deflection of galvanometer is x, what would be its value if the radius of the wire AB is doubled?

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ALLEN-CURRENT ELECTRICITY-EXERCISE-IV A
  1. In the circuit element given here, if the potential at point B, V(B)=0...

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  2. A copper wire has a square cross-section, 2.0 mm on a side. It carr...

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  3. The emf of a battery is 2V and its internal resistance is 0.5Omega the...

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  4. The potential difference across the 100Omega resistance in the circuit...

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  5. The equivalent resistance between the point P and Q in the network giv...

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  6. When connected across the terminals of a cell, a voltmeter measures 5 ...

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  7. Thirteen resistances each of resistance R ohm are connected in the cir...

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  8. A group of N cells whose emf varies directly with the internal resista...

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  9. A galvanometer has resistance 36Omega if a shunt of 4Omega is added wi...

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  10. If 10^(6) electrons/s are flowing through an area of cross section of ...

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  11. The terminal voltage is (E)/(2) when a c urrent of 2A is flowing throu...

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  12. A 1Omega voltmeter has range 1V find the additional resistance which h...

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  13. The length of a given cylindrical wire is increased by 100%. Due to th...

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  14. The length of a wire of a potentiometer is 100 cm, and the emf of its ...

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  15. Which of the following is // are unit of current ?

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  16. In the shown arrangement of the experiment of the meter bridge if AC c...

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  17. The current in a conductor varies with time t as I=2t+3t^2 where I is...

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  18. The ammeter A reads 2A and the voltmeter V reads 20V, the value of res...

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  19. Resistance in the two gaps of a meter bridge are 10 ohm and 30 ohm res...

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  20. Two wires of resistance R(1) and R(2) have temperature co-efficient of...

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