1. Two electric fans p and 2 p watt respectively are connected in series. What is the power of the combination in watt ?

1. 1. p

   
   
   

   2. 3 p

   
   
   

   3. 2p / 3

   
   
   

   4. 3 p / 2

   
   
   

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   N/A

   Correct Option: C

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2. A.C power is transmitted from a power house at a high voltages because

1. 1. The rate of transmission is faster at high voltages

   
   
   

   2. It is more economical due to less power loss

   
   
   

   3. Power cannot bee transmitted at low voltage

   
   
   

   4. A precaution against theft of transmission line

   
   
   

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   N/A

   Correct Option: B

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3. A fuse is used in mains electric supply as a safety devices. Which one of the following statements about the fuse is correct?

1. 1. It connected in parallel with the main switch

   
   
   

   2. It is made mainly form silver alloys

   
   
   

   3. It must have a low melting point

   
   
   

   4. It must have a very high resistance

   
   
   

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   N/A

   Correct Option: C

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4. Which one of the following statements is correct ? The space surrounding a charge in uniform motion has

1. 1. Only an electric held

   
   
   

   2. Only a magnetic fields

   
   
   

   3. Both electric and magnetic fields

   
   
   

   4. Neither an electric field nor a magnetic field

   
   
   

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   N/A

   Correct Option: C

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5. The inductance of coil is proportional to

1. 1. Its length

   
   
   

   2. The number of turns

   
   
   

   3. The resistance of the coil

   
   
   

   4. The square of the number of turns

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: D

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