Electromagnetic Waves MCQs: Preparing for the NEET, a national-level exam conducted annually for students aiming to pursue a career in the medical field, is important due to the high competition. Electromagnetic Waves chapter 8 from class 12 physics is an essential part of NEET preparation. Students should practice Electromagnetic Waves NEET Questions according to the NEET Physics Syllabus to do well.
Knowing the NEET Physics Chapter-wise weightage helps you focus on the right topics. Regular practice with Electromagnetic Waves MCQs, including those for Class 12, is key. Resources like Electromagnetic Waves Questions and Answers can significantly improve preparation and performance. Students should also use expert-created EM Waves MCQs provided below to boost their NEET preparation.Also Check: NEET Physics Notes
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Q 1. The S.I unit of displacement current is;
(1) Henry (2) Coulomb (3) Ampere (4) FaradAns. 3
Q 2. Displacement current is continuous;
(1) when the magnetic field is changing in the circuit. (2) when an electric field is changing in the circuit. (3) in both types of fields. (4) through wires and resistance only.Ans. 2
Q 3. The charging current for the capacitor is 0.5 A. The value of displacement current is;
(1) 0.25 A (2) 0.5 A (3) 1 A (4) zeroAns. 2
Q 4. A capacitor is fully charged by a D.C. battery, find the value of displacement current in the capacitor.
(1) 0 (2) 3 μA (3) 4 μA (4) 2 μAAns. 1
Q 5. Displacement current is;
(1) same as conduction current due to flow of free electrons. (2) same as conduction current due to flow of positive ions. (3) same as conduction current due to flow of both positive and negative free charge carriers. (4) not a conduction current but is caused by a time-varying electric field.Ans. 4
Q 6. Displacement current is set up between the plates of a capacitor when the potential difference across the plates is;
(1) maximum (2) minimum (3) zero (4) varyingAns. 4
Q 7. The voltage across a capacitor of 1 μF given as V = sin(2t), find displacement current at t = 0.
(1) 0 μF (2) 3 μF (3) 4 μF (4) 2 μFAns. 4
Q 8. If a variable frequency A.C. source is connected to a capacitor then with a decrease in frequency, the displacement current will;
(1) increase. (2) decrease. (3) remains constant. (4) first decrease then increase.Ans. 2
Q 9. Assertion (A): A changing electric field produces a magnetic field.
Reason (R): A changing magnetic field produces an electric field.
(1) Both Assertion (A) and Reason (R) are true, and the Reason (R) is a correct explanation of the Assertion (A). (2) Both Assertion (A) and Reason (R) are true, and the Reason (R) is not a correct explanation of the Assertion (A). (3) Assertion (A) is true, but the Reason (R) is false. (4) Assertion (A) is false, but the Reason (R) is true.Ans. 2
Q 10. Electromagnetic wave is produced due to;
(1) Uniformly moving charge (2) Static charge (3) Accelerated charge (4) All of theseAns. 3
Q 11. Maxwell’s equations describe the fundamental laws of;
(1) Electricity only (2) Magnetism only (3) Mechanics only (4) Both (1) and (2)Ans. 4
Q 12. EM waves can transport;
(1) Momentum (2) energy (3) charge (4) Both (1) and (2)Ans. 4
Q 13. The cross product of electric and magnetic fields gives;
(1) direction of EM wave propagation (2) speed of light (3) null vector (4) All of theseAns. 1
Q 14. During the propagation of an electromagnetic wave, the phase difference between oscillating electric and magnetic field vector is;
(1) 90° (2) zero (3) 45° (4) 60°Ans. 2
Q 15. Which of the following statements is false for the properties of electromagnetic waves?
(1) These waves do not require any material medium for propagation. (2) Both electric and magnetic field vectors attain the maxima and minima at the same place and same time. (3) The energy in electromagnetic waves is divided equally between electric and magnetic filed vectors. (4) Both electric and magnetic field vectors are parallel to each other and perpendicular to the direction of propagation of the wave.Ans. 4
Q 16. In the electromagnetic wave, the electric and magnetic field is not related as;
(1) They are perpendicular to each other. (2) They have a phase difference of 90°. (3) They have no phase difference. (4) They have equal energy density.Ans. 2
Q 17. Which of the following rays has the highest wavelength?
(1) X-rays (2) Radiowaves (3) UV-rays (4) MicrowavesAns. 2
Q 18. The frequency order of (A) g-rays, (B) X-rays, (C) UV rays;
(1) A > B > C (2) B > A > C (3) C > A > B (4) B > C > AAns. 1
Q 19. The correct arrangement of colors in the descending order of their wavelength is;
(1) yellow, violet, green, orange (2) orange, yellow, green, violet (3) violet, green, yellow, orange (4) yellow, green, orange, violetAns. 2
Q 20. What is the cause of “Green house effect”?
(1) Infrared rays (2) Ultraviolet rays (3) X-rays (4) Radio wavesAns. 1
Q 21. Which of the following is not an electromagnetic wave?
(1) infrared rays (2) g-rays (3) X-rays (4) b-raysAns. 4
Q 22. Electromagnetic wave with the shortest wavelength among the following is;
(1) X-rays (2) gamma rays (3) microwaves (4) ultraviolet raysAns. 2
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