6. 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

   N/A

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7. 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

   N/A

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8. A DC voltmeter is capable of measuring a maximum of 300 volts. if it is used to measure the voltage across a device operating at 200 voltage AC supply, the reading of the voltmeter will be

1. 1. 300 volt

   
   
   

   2. 220 volt

   
   
   

   3. 110 volt

   
   
   

   4. 0 volt

   
   
   

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   N/A

   Correct Option: D

   N/A

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9. The circuit element where the impressed voltage is always in phase with the resulting current is

1. 1. An ideal resistor

   
   
   

   2. An ideal capacitor

   
   
   

   3. An ideal coil

   
   
   

   4. An ideal transformer

   
   
   

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   N/A

   Correct Option: A

   N/A

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10. A permanent magnet repels

1. 1. Ferromagnetic substances only

   
   
   

   2. Diamagnetic substances only

   
   
   

   3. Paramagnetic substances only

   
   
   

   4. Both paramagnetic and diamagnetic substances

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: B

   N/A

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