41. In television broadcast, the picture signals are transmitted by

1. 1. amplitude modulation

   
   
   

   2. frequency modulation

   
   
   

   3. phase modulation

   
   
   

   4. angle modulation

   
   
   

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   In television broadcast, the picture signals are transmitted by frequency modulation.

   Correct Option: B

   In television broadcast, the picture signals are transmitted by frequency modulation.

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42. If a body is charged by rubbing it, its weight

1. 1. remains precisely constant

   
   
   

   2. increases slightly

   
   
   

   3. decreases slightly

   
   
   

   4. may increase slightly or may decrease slightly

   
   
   

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   may increase slightly or may decrease slightly

   Correct Option: D

   may increase slightly or may decrease slightly

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43. When an electrical safety fuse is rated (marked) as 16 A, it means it

1. 1. will not work if current is less than 16 A

   
   
   

   2. has a resistance of 16 W

   
   
   

   3. will work if the temperature is more than 16° C

   
   
   

   4. will be blown (break) if current exceeds 16 A

   
   
   

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   will be blown (break) if current exceeds 16 A

   Correct Option: D

   will be blown (break) if current exceeds 16 A

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44. Why does one experience a strong shock when one accidentally touches a live wire of , say, 220 V?

1. 1. The resistance of human body is very low

   
   
   

   2. The resistance of human body is very high

   
   
   

   3. The human body is sensitive to even feeble currents

   
   
   

   4. The human body is sensitive to large currents only

   
   
   

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1. View Hint View Answer Discuss in Forum

   The resistance of human body is very high

   Correct Option: B

   The resistance of human body is very high

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45. The magnet is strongest near the

1. 1. poles of the magnet

   
   
   

   2. ends of the magnet

   
   
   

   3. centre of magnet

   
   
   

   4. on equator point from the poles of the magnet

   
   
   

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   ends of the magnet

   Correct Option: B

   ends of the magnet

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