211. Which of the following pairs of parameters and expressions is/are correctly matched?
     1. Characteristic impedance ............ E/ H √∈_r
     2. Power flow density ...... ∇ × H
     3. Displacement current in non-conducting medium ...... E × H Select the correct answer using the codes given below:

1. 1. 1 alone

   
   
   

   2. 2 and 3

   
   
   

   3. 1 and 3

   
   
   

   4. 1 and 2

   
   
   

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   NA

   Correct Option: A

   NA

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212. Match List-I with List-II and select the correct answer using the codes given below the Lists:
     

     List-I	List-II
     (a) ∇ ⋅ D = ρ	1. Ampere's Law
     (b) ∇ ⋅ J = −δρδt	2. Gauss's Law
     (c) ∇ × H = Jc	3. Faraday's Law
     (d) ∇ × E = δB/δt	4. Continuity equation

1. 1. (a) (b) (c) (d)
      4  2  1  3

   
   
   

   2. (a) (b) (c) (d)
      2  4  1  3

   
   
   

   3. (a) (b) (c) (d)
      4  2  3  1

   
   
   

   4. (a) (b) (c) (d)
      2  4  3  1
      

   
   
   

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   NA

   Correct Option: B

   NA

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213. In order to radiate 100 W from a circular loop of circumference equal to 0.1 λ, the current required will be—

1. 1. 10 A

   
   
   

   2. 100 A

   
   
   

   3. 200 A

   
   
   

   4. 400 A

   
   
   

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   NA

   Correct Option: A

   NA

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214. Which one of the following sets of equations is independent in Maxwell's equations?

1. 1. The two curl equations

   
   
   

   2. The two divergence equations

   
   
   

   3. Both the curl and divergence equations

   
   
   

   4. The two curl equations combined with the continuity equation
      

   
   
   

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   NA

   Correct Option: C

   NA

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215. Which one of the following statements does not pertain to the equation ∇. B = 0?

1. 1. There are no sinks and sources for magnetic fields

   
   
   

   2. Magnetic field is perpendicular to the electric field

   
   
   

   3. Single magnetic pole cannot exist

   
   
   

   4. B is solenoidal

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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