1. The deflection expression θ ∝ v² dc/dθ applies to the:
   

1. 1. Moving iron type instrument
      

   
   
   

   2. Electrodynamic type instrument
      

   
   
   

   3. Electrostatic type instrument
      

   
   
   

   4. Induction type instrument

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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2. Which of the following is not a disadvantage of LVDT?
   

1. 1. A LVDT is inherently low in power output
      

   
   
   

   2. Relativity large displacements are required for appreciable differential output
      

   
   
   

   3. They are sensitive to stray magnetic field and vibration
      

   
   
   

   4. All of the above

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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3. Which of the following instrument should be used for measuring AC current?
   

1. 1. Induction type ammeter
      

   
   
   

   2. Moving iron (attraction type) ammeter
      

   
   
   

   3. Moving iron voltmeter
      

   
   
   

   4. Permanent magnet type ammeter

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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4. ‘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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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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5. The instrument whose deflection is given by the expression θ ∝ dM/dθ is known as:
   

1. 1. Electrodynamic type
      

   
   
   

   2. Repulsion type
      

   
   
   

   3. Electrostatic type
      

   
   
   

   4. Attraction type

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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