COMEDK · Physics · 24. Electromagnetic Waves
The ratio of amplitude of magnetic field to the amplitude of electric field of an electromagnetic wave propagating in vacuum is
- A reciprocal of speed of light in vacuum
- B the speed of light in vacuum
- C proportional to frequency of the electromagnetic wave
- D inversely proportional to the frequency of the electromagnetic wave
Answer & Solution
Correct Answer
(A) reciprocal of speed of light in vacuum
Step-by-step Solution
Detailed explanation
For an electromagnetic wave, Speed of electromagnetic wave, \(c=\frac{E_0}{B_0}\) \(\therefore \frac{B_0}{E_0}=\frac{1}{c}=\) reciprocal of speed
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- A screen is placed \(2 \mathrm{~m}\) away from a narrow slit. It the first minimum lies 5 mm from either side of the central maxima, when plane waves of wavelength \(5 \times 10^{-7} \mathrm{~m}\) are used, the slit width isCOMEDK 2014 Hard
- The critical angle for a typical glass air interface is \(42^\circ\). If a ray of light falls normally on one of the faces of the prism of angle \(45^\circ\). The emergent ray will:COMEDK 2026 Medium
- Across the 220 V source of internal resistance \(20 \Omega\), how many lamps of \(40 \mathrm{~W}, 100 \mathrm{~V}\) can be connected in parallel so that all the lamps may glow with full brightness.COMEDK 2025 Medium
- An electron of an atom transits from \(n_{1}\) to \(n_{2}\). In which of the following maximum frequency of photon will be emitted?COMEDK 2020 Easy
- For the same resonant frequency, if \(L\) is changed from \(L\) to \(\dfrac{L}{3}\), then capacitance should change from \(C\) toCOMEDK 2021 Medium
- Quality factor of a series \(L-C-R\) circuit decreases from 3 to 2 . Resonant frequency is \(600 \mathrm{~Hz}\). Change in bandwidth isCOMEDK 2016 Hard
More PYQs from COMEDK
- The density of a gas \(A\) is thrice that of a gas \(B\) at the same temperature. The molecular weight of gas \(B\) is twice that of \(A\). What will be the ratio of pressure acting on \(B\) and \(A\) ?COMEDK 2021 Medium
- \(1 \mathrm{~cm}^3 \text { of } 0.01 \mathrm{~M} \mathrm{~HCl} \text { is added to } 1 \mathrm{~L} \text { of } \mathrm{NaCl} \text { solution. The } \mathrm{pH} \text { of the resulting solution is: }\)COMEDK 2024 Medium
- The enolic form of butanone containsCOMEDK 2024 Medium
- In Young's double slit experiment, a third slit is made in between the double slits. Then,COMEDK 2018 Hard
- Which of the following is not a group with respect to the given operation?COMEDK 2020 Medium
- If the function \(f(x)=\mu \sin x+\dfrac{1}{3} \sin 3 x\) has its derivative equal to zero at \(x=\dfrac{\pi}{3}\), then the value of ' \(\mu\) ' isCOMEDK 2025 Easy