186. Magnetic effect of current was discovered by

1. 1. Faraday

   
   
   

   2. Oersted

   
   
   

   3. Kirchhoff

   
   
   

   4. Joule

   
   
   

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   N/A

   Correct Option: B

   N/A

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187. The unit of magnetic flux is

1. 1. Weber

   
   
   

   2. Henry

   
   
   

   3. Weber / m²

   
   
   

   4. Ampereim

   
   
   

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   N/A

   Correct Option: A

   N/A

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188. The capacity of a pure capacitor is 1 farad. In D.C. circuit, its effective resistance will be

1. 1. Zero

   
   
   

   2. Infinite

   
   
   

   3. 1 ohm

   
   
   

   4. 1 / 2 ohm

   
   
   

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   N/A

   Correct Option: B

   N/A

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189. Two electric bulbs whose resistances are in the ratio 1 : 2 are connected in parallel to a constant voltage source. the power dissipated in them have the ratio

1. 1. 1 : 2

   
   
   

   2. 1 : 1

   
   
   

   3. 2 : 1

   
   
   

   4. 1 : 4

   
   
   

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   N/A

   Correct Option: C

   N/A

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190. Potentiometer measures potential more accurately because

1. 1. It measures potential in the closed circuit

   
   
   

   2. It measures potential in the open circuit

   
   
   

   3. It uses high resistance potential in the open circuit

   
   
   

   4. None of the above

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: B

   N/A

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