131. When an AC source is connected across a resistor

1. 1. The current leads the voltage in phase

   
   
   

   2. The current legs behind the voltage in phase

   
   
   

   3. The current and voltage are in same phase

   
   
   

   4. None of the above

   
   
   

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   Correct Option: C

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132. Consider the following statements
     An ordinary light bulb has a rather short life because the
     1. Filament wire is not uniform
     2. Bulb cannot be evacuated completely
     3. Wires supporting the filament melt at high temperatures.
     Which of the above statements are correct?

1. 1. 1 and 3

   
   
   

   2. 2 and 3

   
   
   

   3. 1 and 2

   
   
   

   4. 1, 2 and 3

   
   
   

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   Correct Option: B

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133. Fluorescent tubes are fitted with a choke. The choke coil

1. 1. Steps up the line voltage

   
   
   

   2. Steps-down the line voltage

   
   
   

   3. Reduces current in the circuit

   
   
   

   4. Chokes low frequency current

   
   
   

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   Correct Option: C

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134. Two wires have their lengths, diameters and resistivities all in the ratio of 1 : 2 : 1. If the resistance of the thinner wire is 10 ohm, the resistance of the thicker wire is

1. 1. 5 ohm

   
   
   

   2. 10 ohm

   
   
   

   3. 20 ohm

   
   
   

   4. 40 ohm

   
   
   

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   N/A

   Correct Option: B

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135. What is the order of magnitude of electric resistance of the human body (dry) ?

1. 1. 10² ohm

   
   
   

   2. 10⁴ ohm

   
   
   

   3. 10⁶ ohm

   
   
   

   4. 10⁸ ohm

   
   
   

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   N/A

   Correct Option: C

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