JEE Main 202118 MarchMorning Shift
- Exam
- JEE Main
- Year
- 2021
- Date
- 18 March
- Shift
- Morning Shift
- Subject
- Physics
- Chapter
- Electromagnetic Waves
JEE Main 2021 · 18 March · Morning Shift · Physics · Electromagnetic Waves
A plane electromagnetic wave of frequency 100MHz 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} = 2 . 0 \times {10}^{- 8}\overset{^}{k}T \cdot (where, \overset{^}{k} is unit vector along direction) What is at this point?
Options
- A0 . 6\overset{^}{j}V{m}^{- 1}
- B6 . 0\overset{^}{k}V{m}^{- 1}
- C6 . 0\overset{^}{j}V{m}^{- 1}
- D0 . 6\overset{^}{k}V{m}^{- 1}
Correct answer
C. 6 . 0\overset{^}{j}V{m}^{- 1}
Step-by-step solution
. (Direction of the wave) ⇒ \overset{^}{i} = \overset{^}{j} \times \overset{^}{k}
⇒ \overset{\to}{E} = 6\overset{^}{j}V{m}^{- 1}
⇒ \overset{\to}{E} = 6\overset{^}{j}V{m}^{- 1}