Shift of the null point when the potentiometer wire's length or potential gradient changes

1. A.
   the null point is obtained at shorter distance.
2. B.
   the potential gradient is increased.
3. C.
   the null point is obtained at larger distance.
4. D.
   there is no change in the null point.

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1. A.
   $\frac{5\text{ }L}{12}$
2. B.
   $\frac{4\text{ }L}{15}$
3. C.
   $\frac{3\text{ }L}{10}$
4. D.
   $\frac{2\text{ }L}{15}$

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1. A.
   decrease
2. B.
   increase
3. C.
   not change
4. D.
   become zero

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1. A.
   Decrease resistance in series with battery
2. B.
   Increase resistance in main Circuit
3. C.
   Decrease resistance in main circuit
4. D.
   Increase applied e.m.f.

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1. A.
   $\dfrac{L}{2}$
2. B.
   $\dfrac{L}{5}$
3. C.
   $\dfrac{L}{3}$
4. D.
   $\dfrac{L}{4}$

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