136. Line insulators are made of:

1. 1. porcelain

   
   
   

   2. mica

   
   
   

   3. marble

   
   
   

   4. PVC

   
   
   

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1. View Hint View Answer Discuss in Forum

   Line insulators are made of porcelain.

   Correct Option: A

   Line insulators are made of porcelain.

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137. Capacitors to be used at high frequencies require a material whose loss angle is:

1. 1. low

   
   
   

   2. high

   
   
   

   3. uniform

   
   
   

   4. one

   
   
   

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   Capacitors to be used at high frequencies require a material whose loss angle is low.

   Correct Option: A

   Capacitors to be used at high frequencies require a material whose loss angle is low.

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138. Dielectric loss is of the order of:

1. 1. 10⁴

   
   
   

   2. 10⁷

   
   
   

   3. 10^–4 to 10^–2

   
   
   

   4. 10⁰

   
   
   

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   NA

   Correct Option: C

   NA

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139. A resistor with negative temperature coefficient is called as a:

1. 1. potentiometer

   
   
   

   2. thermistor

   
   
   

   3. phototransistor

   
   
   

   4. varactor

   
   
   

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1. View Hint View Answer Discuss in Forum

   A resistor with negative temperature coefficient is called as the thermistor.

   Correct Option: B

   A resistor with negative temperature coefficient is called as the thermistor.

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140. In an imperfection free crystal, the resistivity will be:

1. 1. infinite

   
   
   

   2. zero

   
   
   

   3. negative

   
   
   

   4. unity

   
   
   

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1. View Hint View Answer Discuss in Forum

   In an imperfection free crystal, the resistivity will be zero.

   Correct Option: B

   In an imperfection free crystal, the resistivity will be zero.

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