devarshi-dt-logo

Question:

If the magnetic field of a plane electromagnetic wave is given by (The speed of light=3×10⁸ m/s) B=100×10⁻⁶sin[2π×2×10¹⁵(t−xc)], then the maximum electric field associated with it is

4×10⁴N/C

4.5×10⁴N/C

6×10⁴N/C

3×10⁴N/C

Solution:

The correct option is D
3×10⁴N/C
E0=B0×c=100×10⁻⁶×3×10⁸=3×10⁴N/C
∴correct answer is 3×10⁴N/C.