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The efficiency of an antenna having a resistance of 30 Ω and radiation resistance of 60 Ω is 
  • a)
    33.3%
  • b)
    50%
  • c)
    66.66%
  • d)
    75% 
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
The efficiency of an antenna having a resistance of 30 Ω and rad...
Concept:
The antenna efficiency of an antenna is given as:
Rr : Radiation resistance
Ra : Effective Antenna resistance
Calculation:
Given:
Radiation resistance (Rr) = 60 Ω 
Antenna resistance (Ra) = 30 Ω 
 
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The efficiency of an antenna having a resistance of 30 Ω and radiation resistance of 60 Ω isa)33.3%b)50%c)66.66%d)75%Correct answer is option 'C'. Can you explain this answer?
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