KCET2014PhysicsMotion in One Dimension
A plane electromagnetic wave of frequency ( 20 MHz ) travels through a space along ( x ) direction. If the electric field vector at a certain point in space is ( 6 ~V ~m ⁻¹ ), what is the magnetic field vector at that point?
Options
- A( 2 10⁻⁸ ~T )
- B( 1 2 10⁻⁸ ~T )
- C2T
- D( 1 2 T )
Correct answer
A. ( 2 10⁻⁸ ~T )
Step-by-step solution
The electric field vector and magnetic field vector are related as [ E B =c ] We know that ( c=3 10⁸ ~ms ⁻¹ ) and it is given that ( E=6 Vm ⁻¹ ) Therefore, ( 6 B =3 10⁸ B= 6 3 10⁸ =2 10⁻⁸ ~T ) Thus, magnetic field vector is ( 2 10⁻⁸ ~T ).