36. Which of the following pairs of material serves as electrodes in chargeable batteries commonly used in device such as torch?

1. 1. Iron and cadmium

   
   
   

   2. Nickel and cadmium

   
   
   

   3. Lead peroxide and lead

   
   
   

   4. Zinc and carbon

   
   
   

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   N/A

   Correct Option: B

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37. Conversion of chemical energy into electrical energy occurs in

1. 1. Atomic bombs

   
   
   

   2. Electric heaters

   
   
   

   3. Battery

   
   
   

   4. Dyname

   
   
   

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   N/A

   Correct Option: C

   N/A

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38. A thermoeletric refrigerator works on

1. 1. Joule effect

   
   
   

   2. Seebeck effect

   
   
   

   3. Peltier effect

   
   
   

   4. None of these

   
   
   

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   N/A

   Correct Option: C

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39. 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

   N/A

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40. The temperature at which termoelectic power of a thermo couple becomes zero, is called

1. 1. Inversion temperature

   
   
   

   2. Neutral temperature

   
   
   

   3. Junction temperature

   
   
   

   4. Null temperature

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: B

   N/A

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