CUET · PHYSICS · PYQ PAPER 2025
The electric field of a plane electromagnetic wave in a medium is given by
\( E = 100 \sin(300z - 6 \times 10^{10}t) \text{ V/m} \).
The velocity of the electromagnetic wave in this medium will be:
- A 0.5 c
- B 0.67 c
- C c
- D 1.5 c
Answer & Solution
Correct Answer
(B) 0.67 c
Step-by-step Solution
Detailed explanation
\( v = \frac{\omega}{k} \) \( v = \frac{6 \times 10^{10}}{300} \) \( v = 2 \times 10^8 \text{ m/s} \) \( v = \frac{2 \times 10^8}{3 \times 10^8} c \) \( v = 0.67 c \)
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