16. ‘50 MHz’ on the specification plate of a CRO indicates that:
    

1. 1. Sweep signal is of 50 MHz
      

   
   
   

   2. Horizontal oscillator frequency is 50 MHz
      

   
   
   

   3. Vertical oscillator frequency is 50 MHz
      

   
   
   

   4. Input signal frequency should be less than 50 MHz

   
   
   

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   NA

   Correct Option: A

   NA

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17. The main application of a self-balancing potentiometer is:
    

1. 1. In calibrating instruments
      

   
   
   

   2. In control systems
      

   
   
   

   3. In power systems
      

   
   
   

   4. It can be used anywhere

   
   
   

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   NA

   Correct Option: B

   NA

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18. For measuring high value of capacitor and low value of inductor one will use:
    

1. 1. Series connection Q-meter
      

   
   
   

   2. Parallel connection Q-meter
      

   
   
   

   3. Direct connection Q-meter
      

   
   
   

   4. All of the above

   
   
   

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   NA

   Correct Option: A

   NA

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19. Two holders drilled in the disc of energy meter on the opposite side of the spindle:
    

1. 1. To increase the deflection torque
      

   
   
   

   2. To eliminate the creeping on no load
      

   
   
   

   3. For proper ventilation
      

   
   
   

   4. To reduce the weight of the disc for easy rotation

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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20. A milliammeter can be used as:
    

1. 1. Voltmeter and ammeter
      

   
   
   

   2. Wattmeter
      

   
   
   

   3. Ohmmeter
      

   
   
   

   4. Frequency meter

   
   
   

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1. View Hint View Answer Discuss in Forum

   A milliammeter can be used as voltmeter and ammeter.

   Correct Option: A

   A milliammeter can be used as voltmeter and ammeter.

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