46. Of the two bulbs in a house, one glows brighter then the other. Which of the two has a large resistance?

1. 1. The bright bulb

   
   
   

   2. The dim bulb

   
   
   

   3. Both have the same resistance

   
   
   

   4. The brightness does not depend upon the resistance

   
   
   

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1. View Hint View Answer Discuss in Forum

   The dim bulb

   Correct Option: B

   The dim bulb

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47. The heating element of an electric heater should be made with a material , which should have

1. 1. high specific resistance and high melting point

   
   
   

   2. high specific resistance and low melting point

   
   
   

   3. low specific resistance and low melting point

   
   
   

   4. low specific resistance and high melting point

   
   
   

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1. View Hint View Answer Discuss in Forum

   high specific resistance and high melting point

   Correct Option: A

   high specific resistance and high melting point

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48. What should be the characteristic of fuse wire?

1. 1. High melting point, high specific resistance

   
   
   

   2. Low melting point, low specific resistance

   
   
   

   3. High melting point, low specific resistance

   
   
   

   4. Low melting point, high specific resistance

   
   
   

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1. View Hint View Answer Discuss in Forum

   Low melting point, high specific resistance

   Correct Option: D

   Low melting point, high specific resistance

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49. Which of the following is not an electromagnetic wave?

1. 1. v - rays

   
   
   

   2. cosmic rays

   
   
   

   3. Microwave

   
   
   

   4. Radio wave

   
   
   

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1. View Hint View Answer Discuss in Forum

   Cosmic ray is not an electromagnetic wave.

   Correct Option: B

   Cosmic ray is not an electromagnetic wave.

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50. A dynamo which is said to generate electricity actually acts as a

1. 1. Source of ions

   
   
   

   2. Source of electric charge

   
   
   

   3. Converter of energy

   
   
   

   4. Source of electrons

   
   
   

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1. View Hint View Answer Discuss in Forum

   A dynamo which is said to generate electricity actually acts as a converter of energy. It converts mechanical energy into electrical energy.

   Correct Option: C

   A dynamo which is said to generate electricity actually acts as a converter of energy. It converts mechanical energy into electrical energy.

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