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BITSAT 2022
Exam
BITSAT
Year
2022
Subject
Physics
Chapter
Electromagnetic Waves

BITSAT 2022 · Physics · Electromagnetic Waves

An electromagnetic wave is propagating along X -axis. At x=1 cm and...

An electromagnetic wave is propagating along XX-axis. At x=1cmx=1 \mathrm{ cm} and t=18st=18 \mathrm{ s}, its electric vector ∣E∣=8V/m|E|=8 \mathrm{ V} / \mathrm{m}, then the magnitude of its magnetic vector is

Options

  1. A266×10−8266 \times 10^{-8}
  2. B3×10−73 \times 10^{-7}
  3. C3.14×10−83.14 \times 10^{-8}
  4. D3.16×10−73.16 \times 10^{-7}

Correct answer

A. 266×10−8266 \times 10^{-8}

Step-by-step solution

As we know that, EB=c so, B=Ec=83×108=\frac{E}{B}=c\text{ so, } B= \frac{E}{c}=\frac{8}{3 \times 10^8}=2.66 \times10^{-8}
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