116. A source of magnetic field is

1. 1. A static electric charge

   
   
   

   2. A moving electric charge

   
   
   

   3. A current loop

   
   
   

   4. Both (b) and (c)

   
   
   

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   N/A

   Correct Option: D

   N/A

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117. A magnetic needle is kept in non uniform magnetic field. It experiences

1. 1. A force and a torque

   
   
   

   2. A force but not a torque

   
   
   

   3. A torque but not a force

   
   
   

   4. None of these

   
   
   

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   N/A

   Correct Option: A

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118. The SI unit of pole strength is

1. 1. Am²

   
   
   

   2. Am^-1

   
   
   

   3. Am^-2

   
   
   

   4. Am

   
   
   

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   N/A

   Correct Option: D

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119. A horizontal cable carries a current from west to east. the direction of the magnetic field produced by the current at a point vertically above the wire is

1. 1. South to north

   
   
   

   2. North to south

   
   
   

   3. East to west

   
   
   

   4. West to east

   
   
   

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   N/A

   Correct Option: B

   N/A

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120. A metallic cylinder carries a direct current. The magnetic field produce by it exists

1. 1. Outside the cylinder only

   
   
   

   2. Inside the cylinder only

   
   
   

   3. Both inside and outside the cylinder

   
   
   

   4. None of the above

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: C

   N/A

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