31. The core of a transformer is laminated so that

1. 1. Ratio of the voltage across the secondary and primary is doubled

   
   
   

   2. The weight of the transformer can be kept low

   
   
   

   3. The rusting of the core is prevented

   
   
   

   4. Energy loss due to eddy currents is minimised

   
   
   

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   NA

   Correct Option: D

   NA

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32. Which of the following is not correctly matched ?

1. 1. Voltameter-potential difference

   
   
   

   2. Ammeter - electric current

   
   
   

   3. Potentiometer - E.M.F.

   
   
   

   4. Meter bridge-electrical resistance

   
   
   

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   NA

   Correct Option: A

   NA

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33. Consider the following statements. A copper voltmeter measures the
    1. Quantity of current passing through the circuit
    2. Amount of copper deposited
    3. Resistance of the circuit
    Which of theses statements are correct ?

1. 1. 1, 2 and 3

   
   
   

   2. 1 and 3

   
   
   

   3. 2 and 3

   
   
   

   4. 1 and 3

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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34. Capacity of parallel plate condenser can be increased by

1. 1. Increasing the distance between the plate

   
   
   

   2. Increasing the thickness of the plate

   
   
   

   3. Decreasing the thickness of the plate

   
   
   

   4. Decreasing the distance between the plate

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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35. The capacitance of parallel plate condenser does not depend on

1. 1. Area of the plate

   
   
   

   2. Metal of the plate

   
   
   

   3. Medium between the plate

   
   
   

   4. Distance between the plate

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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