JEE Main Physics: Electromagnetic Waves Practice Questions

14 questions with answers and step-by-step solutions. Tap any question to see the full worked solution.

Q1.
Which of the following electromagnetic waves has the longest wavelength?
Easy
Q2.
The speed of electromagnetic waves in a vacuum is given by the expression involving the permeability of free space mu0 and permittivity of free space epsilon0.
Easy
Q3.
Electromagnetic waves are transverse in nature. This is evident from the fact that they can be:
Easy
Q4.
What is the frequency of an electromagnetic wave if its wavelength is 3 meters and it travels at the speed of light 3 times 10 to the power of 8 meters per seco
Easy
Q5.
Which part of the electromagnetic spectrum is used in radar systems for aircraft navigation?
Easy
Q6.
An electromagnetic wave is propagating in a vacuum with an electric field given by E = E0 sin(kx - omega*t) j-cap. What is the direction of the associated magne
Medium
Q7.
$T h e in t e n s i t y o f an e l ec t r o ma g n e t i c w a v e i s 0.06 W / m^{2} . W ha t i s t h e ma x im u m v a l u eo f t h e ma g n e t i c f i e l d a ssoc ia t e d w i t h t hi s w a v e ?$
Medium
Q8.
A plane electromagnetic wave travels in free space along the x-direction. If the frequency of the wave is 50 MHz, what is the wavelength of the wave?
Medium
Q9.
Which of the following statements is correct regarding the energy density of an electromagnetic wave?
Medium
Q10.
A plane electromagnetic wave of frequency 50 MHz travels in free space along the positive x-direction. At a particular point in space and time, the electric fie
Hard
Q11.
$T h e in t e n s i t y o f a pl an ee l ec t r o ma g n e t i c w a v e i s 0.02 W / m^{2} . W ha t i s t h er a d ia t i o n p r ess u r ee x er t e d b y t hi s w a v eo na p er f ec tl y r e f l ec t in g s u r f a ce a t n or ma l in c$
Hard
Q12.
A parallel plate capacitor with circular plates of radius R is being charged. The displacement current between the plates is equal to the conduction current in
Hard
Q13.
An electromagnetic wave has an electric field amplitude of 100 V/m. What is the average energy density of the wave in free space?
Hard
Q14.
A plane electromagnetic wave is incident on a dielectric medium with refractive index n = 1.5. What is the ratio of the speed of the wave in the medium to the s
Hard

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