In a potentiometer, potential difference...

In a potentiometer, potential difference across the potentiometer wire is directly proportional to its

Length

area

resistance

all of these

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In potentiometer the potential gradient is –

Potential gradient of a potentiometer is equal to

The potential gradient for a potentiometer depends on

The length of a potentiometer wire is 10m and a potential difference of 2 volt is applied to its ends. If the length of its wire is increased by 1m, the value of potential gradient in volt/m will be (potential difference across potentiometer wire remain same)

The wire of potentiometer is made of

For the same potential difference, a potentiometer wire is replaced by another one of a high specific resistance. The potential gradient then ( r=R_h=0 )

A cell with considerable internal resistance is connected directly across the terminals of the potentiometer wire. The potential gradient is now 'G'. Now the potentiometer wire is replaced by another wire of same material but double the length and having the same radius as that of the original wire. The new potential gradient on the wire with the same cell connected as before is (A) G/2 (B) G (C) G/2

Assertion : Potentiometer is used only to compare potential differences. Reason: The potentiometer draws current from the voltage source being measured .

A potentiometer wire AB as shown in 40 cm long of resistance 50Omega//m free end of an ideal galvanometer is touching the potentiometer wire with the help of a jockey. What should be the velocity of the jockey as a function of time so that potential difference across the galvanometer is varying with time as (2sinpit)V

NIKITA PUBLICATION-CURRENT ELECTRICITY-Multiple Choice Questions

If in the experiment of Wheatstone's bridge, the positions of cells an...
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If the balance point is obtained at the 35th cm in a metre bridge the ...
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In a potentiometer, potential difference across the potentiometer wire...
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If the length of potentiometer wire is increased, then the accuracy in...
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In a potentiometer circuit, all the +ve terminals should be connected...
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The best instrument for the accurate measurement of the e.m.f. of a ce...
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A potentiometer is an ideal device of measuring potential difference b...
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The e.m.f. of two cells can be compared by
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The balancing lengths for the cells of e.m.f. E(1) and E(2) are l(1)...
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The equation, ( E(1))/(E(2))= (l(1)+l(2))/(l(1)-l(2)), is used to com...
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The internal resistance of the cell can be determined by,
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The unit of potential gradient is
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In comparing e.m.f. of two cells by a potentiometer balance point is o...
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The sensitivity of the potentiometer can be increased by
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Which of the following can cause the null point of a potentiometer to ...
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When null point is obtained in the potentiometer the current is draw...
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Potentiometer was first invented by
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In the construction of potentiometer, the length of wire used is
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A potentiometer is more sensitive when
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Instead of voltmeter, potentiometer is always used to measure e.m.f. ...
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