Electromagnetic Waves — practice questions
61 curated practice questions from Electromagnetic Waves (Physics NEET, NTA Exams) — 40 easy, 9 medium, 12 hard. Every question includes the final answer free; step-by-step worked solutions with a free account.
- All components of the electromagnetic spectrum in vacuum have the same :
- Which of the following is not transported by the electromagnetic waves ?
- Assertion : The pairs E x , B y and E y , B x , components of space and time varying electric field ( E ) and magnetic…
- The electric and magnetic field of an electromagnetic wave are :
- The electromagnetic waves travel with a velocity in a medium material :
- Choose the correct option. (i) The wavelength of microwaves is greater than that of UV-rays. (ii) The wavelength of…
- The amplitude of an electromagnetic wave in vac-uum is doubled with no other changes made to the wave. As a result of…
- A sinusoidal electromagnetic plane wave travels through the empty space in x – direction. The electric wave is…
- The characteristic impedance (Z 0 ) of free space is
- The rms value of the electric field of light coming from the Sun is 720 N/C. The average total energy density of the…
- Pick out the longest wavelength from the following types of radiations.
- Which of the following electromagnetic waves have the smallest wavelength ?
- A charged particle oscillates about its mean equilibrium position with a frequency of 10 9 Hz. Frequency of the…
- Light is an electromagnetic wave. Its speed in vacnum is given by the expression :
- A radio can tune to any station in the 7.5 MHz to 12 MHz band. What is the corresponding wavelength band?
- In an electromagnetic wave, the magnitude of electric and magnetic fields are 100 V/m and 0.265 A/m. The maximum energy…
- Which of the following is the unit of displacement current ?
- An Electromagnetic wave radiates outwards from a dipole antenna, with E 0 as the amplitude of its electric field…
- Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A)…
- Which rays are not the portion of electromagnetic spectrum ?
- The E.M. wave with shortest wavelength among the following is
- Synthetisation of vitamin D when the skin is exposed to light is a property of :
- Assertion : The displacement current is always equal to the conduction current. Reason : The displacement current is…
- An electromagnetic wave of frequency µ = 3 MHz passes from vacuum into a dielectric medium with permittivity e = 4…
- In an electromagnetic wave, the amplitude of electric field is 1 V/m. The frequency of wave is m 5 × 10 14 Hz and is…
- The electromagnetic waves travel with a velocity in vacuum :
- When an electromagnetic wave enters an ionized layer of earth’s atmosphere present in ionosphere_____.
- Fundamental particle in an electromagnetic wave is :
- In a plane electromagnetic wave travelling in free space, the electric field component oscillates sinusodially 48 Vm -1…
- Electromagnetic waves are transverse in nature is evident by :
- It is possible to take pictures of those objects which are not fully visible to the eye using camera films sen-sitive…
- A plane electromagnetic wave travelling along the X-direction has a wavelength of 3 mm The variation in the electric…
- What is order of energy of X-rays (E X ), radio waves (E R ) and microwaves (E M )?
- If a variable frequency ac source connected to a capacitor then with decrease in frequency, the dis-placement current…
- All components of the electromagnetic spectrum in vacuum have the same
- Electromagnetic wave consists of periodically oscil-lating electric and magnetic vectors :
- The electric field part of an electromagnetic wave in a medium is represented by array l E_ x =0 E_ y =2.5 N c [ (2 10^…
- The electric field in an electromagnetic wave is given by : E = (50 N/C ) sin (t- x c ) If the energy contained in a…
- Which of the following statements about electro-magnetic waves is/are true ? (i) Electromagnetic waves travel at the…
- Find the mean Poynting vector s of a plane electromagnetic wave E = E m cos( w t – kr ), if the wave propagates in…
- A plane electromagnetic wave of frequency 25 MHz travels in free space along the x - direction. At a par-ticular point…
- Given below are two statements Statement I : Electromagnetic wave are transverse in nature. Statement II : The electric…
- The electric field of an electromagnetic wave in free space is given by E =10 (10^ 7 t+k x ) j V/m where t and X are in…
- Which of the following has zero average value in a plane electromagnetic wave ?
- If λ v , λ x and λ m represents the wavelength of visible light, X-rays and microwaves respectively, then:
- Find the amplitude of the electric field in a parallel beam of light of intensity 2.0 W/m 2 .
- A parallel plate capacitor with plate area A and sepa-ration between the plates d , is charged by a constant current I…
- The magnetic field in a travelling electromagnetic wave has a peak value of 20 nT. The peak value of electric field…
- Match column I and column II and choose the correct combination from the given options : Column I Column II (A)…
- Which of the following wave cannot be produced by charges accelerating in AC circuits having an induc-tor and capacitor…
- Assertion : The velocity of electromagnetic waves depends on electric and magnetic properties of the medium. Reason …
- In an electromagnetic wave, the direction of the magnetic induction B is________.
- If E and B represent electric and magnetic field vec-tors of the electromagnetic wave, the direction of propagation of…
- The magnetic field of an electromagnetic wave is given by E _ y =3 10^ -7 (10^ 3 x +6.28 10^ 12 t ) All numerical…
- The ratio of contributions made by the electric field and magnetic field components to the intensity of an EM wave is :
- To produce an instantaneous displacement current of 2 mA in the space between the parallel plates of a capacitor of…
- The rms value of the electric field of the light coming from the sun is 720 N/C . The average total energy density of…
- 0 and 0 are the electric permittivity and magnetic permeability of free space respectively. If the corresponding…
- Given below are two statements Statement I : Displacement current goes through the gap between the plates of a…
- ______ was the first to demonstrate the existence of electromagnetic waves.
- The magnetic field of an electromagnetic wave is given by, B y = 3 × 10 –7 sin (10 3 x + 6.28 × 10 12 t ) The…