The potentiometer- Comparison of emf
1)What is the use of a potentiometer?
  

2)Which of the following is an example of primary cell?
  

3)Name the device which is used to measure the internal resistance of a cell?
  

4)What is the principle behind potentiometer?
  

5)Potentiometer is often called as ideal voltmeter. Why?
  

6)How can you increase the accuracy of a potentiometer?
  

7)Which of the following is a factor, on which the emf of a cell depends?
  

8)In a potentiometer experiment to compare the emf's of two primary cells, the balancing points obtained as l1 and l2 respectively. If E2 be the emf of the second cell, what is the emf E1 of the other cell?
  


  


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