186. Radio waves of constant amplitude can be generated with

1. 1. Filter

   
   
   

   2. Rectifier

   
   
   

   3. FET

   
   
   

   4. Oscillator

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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187. Which of the following is different from the others ?

1. 1. Amplitude

   
   
   

   2. Velocity

   
   
   

   3. Frequency

   
   
   

   4. Wavelength

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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188. In vacuum, the speed of light

1. 1. Depends on its wavelength

   
   
   

   2. Depends on its frequency

   
   
   

   3. Depends on its intensity

   
   
   

   4. Neither depends on its wavelength, frequency nor intensity

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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189. Match List - I (type of electromagnetic radiation ) with List - II (corresponding wavelength ) and select the correct answer using the codes given below
     

     	List-I		List-II
     F	Radio waves	1.	4x10-7 - 7x10-7 m
     G	Uitraviolet waves	2.	10-11 - 10-9 m
     H	Visible light	3.	10-6 - 10-3 m
     J	X - rays	4.	10-3 - 10-5 m
     		5.	10-9 - 107 m

     Code

     	F	G	H	J
     A.	3	2	4	5
     B.	4	5	1	2
     C.	3	5	4	2
     D.	4	2	1	5

1. 1. A.

   
   
   

   2. B.

   
   
   

   3. C.

   
   
   

   4. D.

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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190. In a stationary wave all the particles of the medium

1. 1. Cross the mean position with different velocities at different instants

   
   
   

   2. Cross the mean position with different velocities at the same instant

   
   
   

   3. Cross the mean position with same velocity

   
   
   

   4. Cross the mean position with same speed

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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