Question 16 : The advantage of potentiometer over voltmeter in measurements of emf is that

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Question 16 : The advantage of potentiometer over voltmeter in measurements of emf is that

 the potentiometer wire is assumed to be uniform

 the temperatue of the wire must remain constant

 faults may arise due to breaks or wrong connections in the circuit

 it does not draw current from the circuit under test

Question 14 : The image of an object which is between the concave mirror's reflecting surface and its principal focus is?

 ANSWER

 it does not draw current from the circuit under test

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