86. A large magnet is broken into two pieces. If lengths of two pieces are in the ratio of 3 : 4 what is the ratio of their pole strengths?

1. 1. 3 : 4

   
   
   

   2. 4 : 3

   
   
   

   3. 1 : 1

   
   
   

   4. 3 : 2

   
   
   

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   N/A

   Correct Option: C

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87. Alternating current instead of direct current is used in long distance electric transmission because

1. 1. It is easy to generate

   
   
   

   2. Rectification is possible

   
   
   

   3. Energy losses are minimum

   
   
   

   4. It causes fewer accidents

   
   
   

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   N/A

   Correct Option: C

   N/A

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88. Curie temperature of iron is the temperature below which it is

1. 1. Superconducting

   
   
   

   2. Radioactive

   
   
   

   3. Ferromagnetic

   
   
   

   4. Diamagnetic

   
   
   

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   N/A

   Correct Option: C

   N/A

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89. Consider the following statements regarding electric fuse wire
    1. If has low melting point
    2. It has very high specific resistance
    3. It is connected in parallel with the electric circuit
    Which of the statements given above is / are correct?

1. 1. 1 only

   
   
   

   2. 1 and 3

   
   
   

   3. 1 and 2

   
   
   

   4. 2 and 3

   
   
   

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   N/A

   Correct Option: A

   N/A

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90. No force is exerted by magnetic field on a stationary

1. 1. Electric dipole

   
   
   

   2. Magnetic dipole

   
   
   

   3. Current loop

   
   
   

   4. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: A

   N/A

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