Nature of electromagnetic waves is :
- ✓Transverse
- BLongitudinal
- CBoth transverse and longitudinal
- DMechanical
Answer: A.
View full solution →Question types
Electromagnetic Waves question types
34 questions across 5 question groups — pick any mix to generate a Physics paper with step-by-step answer keys.
34
Questions
5
Question groups
5
Question types
01
M.C.Q [1M]
14 Q→021 Marks Question
4 Q→03Short Answer Type Questions [2M]
11 Q→043 Marks Question
3 Q→05Long Answer Type Questions [5M]
2 Q→Sample Questions
Electromagnetic Waves questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Which of the following is not electromagnetic wave ?
- ALight waves
- BX-rays
- ✓Sound waves
- DInfrared rays
Answer: C.
View full solution →The energy of an electromagnetic radiation is 13.2 keV. The radiation is related to which region of spectrum ?
- AVisible
- ✓X-rays
- CUltra-violet
- DInfrared
Answer: B.
View full solution →The unit of the ratio of magnetic field B and electric field E i.e., $(B/E)$ is :
- A$ms^{-1}$
- ✓$sm^{-1}$
- Cms
- D$ms^{-2}$
Answer: B.
View full solution →The direction of propagation of electromagnetic wave is :
- Aparallel to $\vec{E}$
- Bparallel to $\vec{B}$
- Cparallel to $\vec{B}\times\vec{E}$
- ✓parallel to $\vec{E}\times\vec{B}$
Answer: D.
View full solution →The amplitude of electric field in a plane electromagnetic wave is $E_{0}=150~N/C$ and its frequency is $v=50$ MHz. Calculate the value of oscillating magnetic field $B_{0}$ and angular frequency $\omega$.
View full solution →Name the electromagnetic waves which :
(a) are useful in removing tension in musceles.
(b) are absorbed by ozone layer in atmosphere.
(a) are useful in removing tension in musceles.
(b) are absorbed by ozone layer in atmosphere.
Name the constituent radiation of electromagnetic spectrum which :
(a) is absorbed by ozone layer in atmosphere.
(b) is produced by striking the electrons of high velocity on metal target.
(c) is used in satellite communication.
(d) has its wavelength range between 400 nm - 700 nm.
(a) is absorbed by ozone layer in atmosphere.
(b) is produced by striking the electrons of high velocity on metal target.
(c) is used in satellite communication.
(d) has its wavelength range between 400 nm - 700 nm.
In which regions of electromagnetic spectrum, the following wavelengths lies ?
(a) 1 $\mu$m, (b) 6563 $\unicode{x212B}$, (c) 820 $\unicode{x212B}$, (d) 1 $\unicode{x212B}$
View full solution →(a) 1 $\mu$m, (b) 6563 $\unicode{x212B}$, (c) 820 $\unicode{x212B}$, (d) 1 $\unicode{x212B}$
(a) An em wave is travelling in a medium with a velocity $\vec{v}=v\hat{i}$. Draw a sketch showing the propagation of the em wave, indicating the direction of oscillating electric and magnetic fields. (b) How are the magnitudes of the electric and magnetic fields related to the velocity of em wave.
View full solution →Identify the electromagnetic waves whose wavelengths lie in the range :
(a) $10^{-11} m<\lambda<10^{-14}m$, (b) $10^{-4}m<\lambda<10^{-6}m$
Write one use of each.
View full solution →(a) $10^{-11} m<\lambda<10^{-14}m$, (b) $10^{-4}m<\lambda<10^{-6}m$
Write one use of each.
Identify the electromagnetic waves whose wavelengths vary as :
(a) $10^{-12} m<\lambda<10^{-8}m$ (b) $10^{-3} m<\lambda<10^{-1}m$
Write one use of each.
View full solution →(a) $10^{-12} m<\lambda<10^{-8}m$ (b) $10^{-3} m<\lambda<10^{-1}m$
Write one use of each.
Why are infrared waves often called heat waves ? Explain.
What is electromagnetic wave? How is its speed is related with permittivity and permeability of the medium?
(a) Identify the part of the electromagnetic spectrum used in (i) radar and (ii) eye surgery. Write their frequency range.
(b) Prove that the average energy density of the oscillating electric field is equal to that of the oscillating magnetic field.
(b) Prove that the average energy density of the oscillating electric field is equal to that of the oscillating magnetic field.
What is electromagnetic wave ? On which factors does its velocity in vacuum depend ?
Write the name of main parts of electromagnetic spectrum with their wavelength range.
(a) Define conduction current. Explain the necessity of displacement current and derive to formula for it.
(b) In adjoining figure a capacitor is shown which is made by placing two circular plates (each of 12 cm radius) at a distance 5.0 cm apart.
The capacitor is being charged by an external source which is not shown in the figure. The charging current is 0.15 A. Calculate:
(i) capacitance of the capacitor and rate of change of potential difference between its plates.
(ii) the displacement current between the plates.
(iii) Is the Kirchhoff's first law related to electric current obeyed on each plate.
(b) In adjoining figure a capacitor is shown which is made by placing two circular plates (each of 12 cm radius) at a distance 5.0 cm apart.
The capacitor is being charged by an external source which is not shown in the figure. The charging current is 0.15 A. Calculate:
(i) capacitance of the capacitor and rate of change of potential difference between its plates.
(ii) the displacement current between the plates.
(iii) Is the Kirchhoff's first law related to electric current obeyed on each plate.
Write the name of different waves in electromagnetic spectrum and give brief introduction of their discovery, wavelength range, properties and applications.
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