JEE Main 202116 MarchMorning Shift
- Exam
- JEE Main
- Year
- 2021
- Date
- 16 March
- Shift
- Morning Shift
- Subject
- Physics
- Chapter
- Electromagnetic Waves
JEE Main 2021 · 16 March · Morning Shift · Physics · Electromagnetic Waves
A plane electromagnetic wave of frequency 500MHz is traveling in a...
A plane electromagnetic wave of frequency is traveling in a vacuum along the direction. At a particular point in space and time, \overset{\to}{B} = 8 . 0 \times {10}^{- 8}\overset{^}{z}T. The value of the electric field at this point is:(speed of light ) \overset{^}{x}, \overset{^}{y}, \overset{^}{z} are unit vectors along and direction.
Options
- A- 24\overset{^}{x}V{m}^{- 1}
- B2 . 6\overset{^}{x}V{m}^{- 1}
- C24\overset{^}{x}V{m}^{- 1}
- D- 2 . 6\overset{^}{x}V{m}^{- 1}
Correct answer
A. - 24\overset{^}{x}V{m}^{- 1}
Step-by-step solution
wave is travelling towards + \overset{^}{j}
\overset{\to}{B} = 8 . 0 \times {10}^{- 8}\overset{^}{z}T
\overset{\to}{E} = \overset{\to}{B} \times \overset{\to}{C} = \left(8 \times {10}^{- 8}\overset{^}{z}\right) \times \left(3 \times {10}^{8}\overset{^}{y}\right)
= - 24\overset{^}{x}V{m}^{- 1}