Electromagnetic Spectrum PYQs: JEE Mains Physics

Showing 1–26 of 26 questions

1. 1. An electromagnetic wave travels in free space along the \(x\)-direction. At a particular point in space and time, \(\vec{B} = 2 \times 10^{-7} \hat{j}\) T is associated with this wave. The value of corresponding electric field \(\vec{E}\) at this point is _______ V/m. 2026 Medium
2. 2. Arrange the following in the ascending order of wavelength : \((A)\) Gamma rays \(\left(\lambda_1\right)\) \((B)\) x-ray \(\left(\lambda_2\right)\) \((C)\) Infrared waves \(\left(\lambda_3\right)\) \((D)\) Microwaves \(\left(\lambda_4\right)\) Choose the most appropriate answer from the options given below : 2024 Hard
3. 3. Match List-\(I\) with List-\(II\) :-

   List - \(I\) (EM-Wave)	List - \(II\) (Wavelength) (Range)
   \((A)\) infra-red	\((i)\) \(<10^{-3} \mathrm{~nm}\)
   \((B)\) Ultraviolet	\((ii)\) \(400 \mathrm{~nm}\) to \(1 \mathrm{~nm}\)
   \((C)\) X-rays	\((iii)\) \(1 \mathrm{~mm}\) to \(700 \mathrm{~nm}\)
   \((D)\) Gamma rays	\((iv)\) \(1 \mathrm{~nm}\) to \(10^{-3} \mathrm{~nm}\)

   Choose the correct answer from the options given below: 2024 Hard
4. 4. Given below are two statement: one is labelled as Assertion \(A\) and the other is labelled as Reason \(R.\) Assertion \(A:\) \(EM\) waves used for optical communication have longer wavelengths than that of microwave, employed in Radar technology. Reason \(R\) : Infrared \(EM\) waves are more energetic than microwaves, (used in Radar) In the light of given statements, choose the correct answer from the options given below: 2023 Medium
5. 5. Match List \(- I\) with List \(- II\)

   List\(-I\) (Layer of atmosphere)	List\(-II\) (Approximate height over earth's surface)
   \((A)\) \(F_1\) - Layer	\((I)\) \(10\,km\)
   \((B)\) \(D-\) Layer	\((II)\) \(170-190\,km\)
   \((C)\) Troposphere	\((III)\) \(100\,km\)
   \((D)\) \(E-\)layer	\((IV)\) \(65-75\,km\)

   Choose the correct answer from the options given below: 2023 Medium
6. 6. Match List \(I\) with List \(II\)

   List \(I\)	List \(II\)
   \(A\) Troposphere	\(I\) Approximate \(\quad 65-75\, km\) over Earth's surface
   \(B\) E-Part of Stratosphere	\(II\) Approximate \(300\,km\) over Earth's surface
   \(C\) \(F _2\)-Part of Thermosphere	\(III\)  Approximate \(10\,km\) over Earth's surface
   \(D\) \(F _2\)-Part of Thermosphere	\(IV\) Approximate \(100\,km\) over Earth's surface

   Choose the correct answer from the options given below: 2023 Medium
7. 7. Match List I with List II

   List - I	List - II
   A. AM Broadcast	I. \(88-108 MHz\)
   B. FM Broadcast	II. \(540-1600 kHz\)
   C. Television	III. \(3.7-4.2GHz\)
   D. Satellite Communication	IV. \(54 MHz-590MHz\)

   Choose the correct answer from the options given below: 2023 Medium
8. 8. Match List \(I\) with List \(II\) of Electromagnetic waves with corresponding wavelength range :

   List \(I\)	List \(II\)
   \((A)\) Microwave	\((I)\) \(400\,nm\) to \(1\,nm\)
   \((B)\) Ultraviolet	\((II)\) \(1\,nm\) to \(10^{-3}\,nm\)
   \((C)\) \(X-\)Ray	\((III)\) \(1\,mn\) to \(700\,nm\)
   \((D)\) Infra-red	\((IV)\) \(0.1\,m\) to \(1\,mm\)

   Choose the correct answer from the options given below: 2023 Medium
9. 9. Match the List\(-I\) with List\(-II\) 

   List \(I\)	List \(II\)
   \(A\) Microwaves	\(I\) Radio active decay of the nucleus
   \(B\) Gamma rays	\(II\) Rapid acceleration and deceleration of electron in aerials
   \(C\) Radio waves	\(III\) Inner shell electrons
   \(D\) \(X\)-rays	\(IV\) Klystron valve

   Choose the correct answer from the options given below 2023 Medium
10. 10.

    List\(-I\)	List\(-II\)
    \(UV\) rays	\((i)\) Diagnostic tool in medicine
    \(X-\) rays	\((ii)\) Water purification
    Microwave	\((iii)\) Communication, Radar
    Infrared wave	\((iv)\) Improving visibility in foggy days

    Choose the correct answer from the options given below. 2022 Medium
11. 11. Mach List-\(I\) with List - \(II\) :

    List - \(I\)	List - \(II\)
    \((a)\) Ultraviolet rays	\((a)\) Study crystal structure
    \((b)\) Microwaves	\((b)\) Greenhouse
    \((c)\) Infrared waves	\((c)\) sterilizing surgical instrument
    \((d)\) \(x\)-rays	\((d)\) Radar system

    Choose the correct answer from the options given below 2022 Medium
12. 12. The displacement current of \(4.425 \,\mu A\) is developed in the space between the plates of parallel plate capacitor when voltage is changing at a rate of \(10^{6} \,Vs ^{-1}\). The area of each plate of the capacitor is \(40 \,cm ^{2}\). The distance between each plate of the capacitor is \(x \times 10^{-3} \,m\). The value of \(x\) is ................ (Permittivity of free space, \(\varepsilon _{0}=8.85 \times 10^{-12} \,C ^{2} N ^{-1} m ^{-2}\) ) 2022 Medium
13. 13. Which is the correct ascending order of wavelengths? 2022 Easy
14. 14. \(AC\) voltage \(V(t)=20\,sin\omega \,t\) of frequency \(50\, {Hz}\) is applied to a parallel plate capacitor. The separation between the plates is \(2\, {mm}\) and the area is \(1 \,{m}^{2}\). The amplitude of the oscillating displacement current for the applied \(AC\) voltage is ...... \(\mu {A}\). [Take \(\left.\varepsilon_{0}=8.85 \times 10^{-12} \,{F} / {m}\right]\) 2021 Hard
15. 15. Match List\(-I\) with List\(-II.\)

    List\(-I\)	List\(-II\)
    \((a)\) \(10\, km\) height over earth's surface	\((i)\) Thermosphere
    \((b)\) \(70\, km\) height over earth's surface	\((ii)\) Mesosphere
    \((c)\) \(180\, km\) height over earth's surface	\((iii)\) Stratosphere
    \((d)\) \(270\, km\) height over earth's surface	\((iv)\) Troposphere

    2021 Medium
16. 16. Match List - \(I\) with List - \(II.\)

    List - \(I\)	List - \(II\)
    \((a)\) Source of microwave frequency	\((i)\) Radioactive decay on nucleus
    \((b)\) Source of infrared frequency	\((ii)\) Magnetron
    \((c)\) Source of Gamma Rays	\((iii)\) Inner shell electrons
    \((d)\) Source of \(X-\)rays	\((iv)\) Vibration of atoms and molecules
    	\((v)\) \(LASER\)
    	\((vi)\) \(RC\) circuit

    Choose the correct answer from the options given below : 2021 Medium
17. 17. Red light differs from blue light as they have : 2021 Medium
18. 18. Choose the correct option relating wavelengths of differnet parts of electromagnetic wave spectrum 2020 Medium
19. 19. The correct match between the entries in column \(I\) and column \(II\) are              \(I\)                         \((II)\) Radiation                     Wavelength \((a)\) Microwave          \((i)\) \(100 m\) \((b)\) Gamma rays      \((ii)\) \(10^{-15} m\) \((c)\) \(A.M.\) radio waves        \((iii)\) \(10^{-10} m\) \((d)\) \(X-\)rays             \((iv)\) \(10^{-3} m\) 2020 Medium
20. 20. Given below in the left column are different modes of communication using the kinds of waves given in the right column

    \(A.\) Optical Fiber Communication	\(P.\) Ultrasound
    \(B.\) Radar	\(Q.\) Infrared Light
    \(C.\) Sonar	\(R.\) Microwaves
    \(D.\) Mobile Phones	\(S.\) Radio Waves

    From the options given below, find the most appropriate match between entries in the left and the right column 2019 Medium
21. 21. Arrange the following electromagnetic radiations per quantum in the order of increasing energy :- \(A\) : Blue light \(B\) : Yellow light \(C\) : X-ray \(D\) : Radiowave 2016 Medium
22. 22. If microwaves, \(X\) rays, infrared, gamma rays, ultraviolet, radio waves and visible parts of the electromagnetic spectrum by are denoted \(M, X, I, G, U, R\) and \(V\) then which of the following is the arrangement in ascending order of wavelength ? 2014 Easy
23. 23. Match List \(- I\) (Electromagnetic wave type) with List \(- II\) (Its association/application) and select the correct option from the choices given below the lists

    લિસ્ટ\(-I\)	લિસ્ટ\(-II\)
    \(a\). Infrared waves	\(i\). To treat muscular strain
    \(b\). Radio waves	\(ii\). For broadcasting
    \(c\). \(X-\)rays	\(iii\). To detect fracture of bones
    \(d\). Ultraviolet rays	\(iv\). Absorbed by the ozone layer of the atmosphere

    \(a\)         \(b\)         \(c\)         \(d\) 2014 Medium
24. 24. Match the List \(-I\) (Phenomenon associated with electromagnetic radiation) with List \(-II\) (Part of electromagnetic spectrum) and select the correct code from the choices given below this lists

    List \(I\)	List \(II\)
    \(I\) Doublet of sodium	\((A)\) Visible radiation
    \(II\) Wavelength corresponding to temperature associated with the isotropic radiation filling all space	\((B)\) Microwave
    \(III\) Wavelength emitted by atomic hydrogen in interstellar space	\((C)\) Short radio wave
    \(IV\) Wavelength of radiation arising from two close energy levels in hydrogen	\((D)\) \(X-\) rays

    2014 Medium
25. 25. Photons of an electromagnetic radiation has an energy \(11\, keV\) each. To which region of electromagnetic spectrum does it belong ? 2013 Medium
26. 26. This question has Statement \(- 1\) and Statements \(- 2\). Of the four choices given after the Statements, choose the one that best describes the two Statements Statement \(-1\) : Out of radio waves and microwaves, the radio waves under go more diffraction Statement \(-2\) : Radio waves have greater frequency compared to microwaves 2013 Easy

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