in the potentiometer circuit shown the balance point is at x  

Q21. In the potentiometer circuit shown, the balance point is at x. State with reason, where the balance point will be shifted when,

                      
             
  (i) resistance R is increased, keeping all barometers unchanged.

  (ii) resistance S is increased, keeping R constant

  (iii) cell p is replaced by another cell whose emf is lower. Then that of all Q.  in the potentiometer circuit shown the balance point is at x

Dear Student,
Answers -
i) If resistance R is increased keeping all other parameters same, null point X will be shifted towards forwards.

ii) If resistance S is increased keeping R constant, balance point X shifts towards backwards.

iii) If cell P is replaced by another cell Q with less EMF, null point X shifts towards backwards.

Regards

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