QJEEM13Ph89b8: JEE Main 2013 Physics - Class 12 JEEM13Ph89b8 Solution: The magnetic field in a travelling electromagnetic wave has a…

Question

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The magnetic field in a travelling electromagnetic wave has a peak value of

20

n

T

. The peak value of electric field strength is :

Accepted Answer

From question,

B_{0} = 20 n T = 20 \times 10^{- 9} T

( as velocity of light in vacuum

C = 3 \times 10^{8} m s^{- 1}

)

{\vec{E}}_{0} = {\vec{B}}_{0} \times \vec{C}

| {\vec{E}}_{0} | = | \vec{B} | . | \vec{C} | = 20 \times 10^{- 9} \times 3 \times 10^{8}

= 6 V / m .

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