One Stop GATE Forum: doubt in emf

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    Hi, 
Am not well with emf pls help me with this prob.. 

*In a non magnetic medium peak value of electric field is 12v/m. if relative permittivity is 100/Sq(pi) ,time avg power per Sq m is 

a) 6 Sq pi W b) .6/ Sq Pi w c) 6/ Sq Pi W d) 12/ Sq Pi W 

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manju Senior Member Joined: 20Feb2007 Online Status: Offline Posts: 221	Topic: doubt in emf Posted: 22Feb2007 at 2:58pm
	Hi, Am not well with emf pls help me with this prob.. In a non magnetic medium peak value of electric field is 12v/m. if relative permittivity is 100/Sq(pi) ,time avg power per Sq m is a) 6 Sq pi W b) .6/ Sq Pi w c) 6/ Sq Pi W d) 12/ Sq Pi W Post Resume:* Click here to Upload your Resume & Apply for Jobs

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balu Senior Member Joined: 20Feb2007 Online Status: Offline Posts: 236	Posted: 22Feb2007 at 3:01pm
	time avg power per Sq m is =EE/2n where n=intrinsic impedance n=intrinsic impedance =120pipi/10=12pipi. so Pavg=(12)^2/(212pipi)=6/pipi W so ans is C)6/ Sq Pi W .Correct me if i am wrong anywhere.
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