JEE Main Physics: Electromagnetic Waves Practice Questions

23 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
Q15.
$The ratio of the amplitude of the electric field to the amplitude of the magnetic field for an electromagnetic wave in a medium with refractive index n is equal$
Medium
Q16.
$A parallel plate capacitor with circular plates of radius R is being charged. The displacement current between the plates is equal to the conduction current in$
Medium
Q17.
$T h e in t e n s i t y o f a pl an ee l ec t r o ma g n e t i c w a v e i s 0.06 W / m^{2} . W ha t i s t h e ma x im u m v a l u eo f t h e ma g n e t i c f i e l d a ssoc ia t e d w i t h t hi s w a v e ?$
Medium
Q18.
$An electromagnetic wave is propagating in a vacuum with an electric field given by E = E0 sin(kx - omega*t) j-cap. What is the direction of the magnetic field v$
Medium
Q19.
$Which of the following statements is correct regarding the properties of electromagnetic waves?$
Medium
Q20.
$A plane electromagnetic wave of frequency 50 MHz travels in free space along the positive x-direction. At a particular point in space and time, the electric fie$
Hard
Q21.
$A parallel plate capacitor with circular plates of radius R is being charged. The displacement current between the plates is equal to the conduction current in$
Hard
Q22.
$The magnetic field in a plane electromagnetic wave is given by B = B0 sin(kx + omega t) k-hat. What is the expression for the electric field vector?$
Hard
Q23.
$What is the frequency of an electromagnetic wave if its wavelength is 3 meters and the speed of light is 3 times 10 to the power of 8 meters per second?$
Easy

Track your progress on Electromagnetic Waves

Start Practising Free →