121. If two bulbs of 25 W and 100 W rated at 200 V, are connected in series across a 440 V supply

1. 1. 25 W bulb will fuse

   
   
   

   2. 100 W bulb will fuse

   
   
   

   3. None will fuse

   
   
   

   4. Both will fuse

   
   
   

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   N/A

   Correct Option: A

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122. Two bulbs are fitted in a room in the domestic electric installation. One of them glows brighter than the other. Then

1. 1. The brighter bulb has smaller resistance

   
   
   

   2. The brighter bulb has larger resistance

   
   
   

   3. Both the bulbs have the same resistance

   
   
   

   4. None of the above

   
   
   

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   N/A

   Correct Option: A

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123. Time period in a vibration magnetometer will be infinite

1. 1. At magnetic equator

   
   
   

   2. At geographic equator

   
   
   

   3. At magnetic pole

   
   
   

   4. No where

   
   
   

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   N/A

   Correct Option: C

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124. Demagnetisation of a magnet can be done by

1. 1. Rough handling

   
   
   

   2. Heating

   
   
   

   3. magnetising in the opposite direction

   
   
   

   4. All by the above

   
   
   

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   N/A

   Correct Option: D

   N/A

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125. Which one of the following is not made of soft iron?

1. 1. Electromagnet

   
   
   

   2. Core of transformer

   
   
   

   3. Core of dynamo

   
   
   

   4. Magnet of loudspeaker

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: D

   N/A

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