# Electromagnetic Waves CBSE Class 12 Physics MCQ Questions with Answer Keys Solutions

If you are preparing for CBSE Class 12 Board Exam Term 1 which will be an objective type questions paper, then you need to practice multiple choice questions of Class 12 Physics Chapterwise. In this article of AKVTutorials, you will get Electromagnetic Waves CBSE Class 12 Physics MCQ Questions with Answer Keys Solutions .

MCQ Questions for Class 12 Physics Chapter 8 Question No 11:

Which part of electromagnetic spectrum can be detected by human eye?

Option A : Gamma rays

Option B : X- rays

Option C : Visible rays

Option D : UV rays

Option C : Visible rays

MCQ Questions for Class 12 Physics Chapter 8 Question No 12:

To treat cancer and tumor in radiography which rays of em spectrum are used?

Option A : X-rays

Option C : Gamma rays

Option D : Visible rays

Option C : Gamma rays

MCQ Questions for Class 12 Physics Chapter 8 Question No 13:

For an EM wave propagating along x-axis Emax= 30V/m, the maximum value of magnetic field is

Option A : 30 Tesla

Option B : 10Tesla

Option C : 107 Tesla

Option D : 10-7 Tesla

Option D : 10-7 Tesla

MCQ Questions for Class 12 Physics Chapter 8 Question No 14:

Option A : Kinetic energy

Option B : Potential energy

Option C : Heat

Option D : EM waves

Option D : EM waves

MCQ Questions for Class 12 Physics Chapter 8 Question No 15:

A) The wavelength of microwaves is greater than that of

B) The wavelength of IR rays is less than that of UV-rays

C) The wavelength of microwaves is less than that of IR rays

D) Gamma ray has the shortest wavelength in the electromagnetic spectrum

Option A : a and b are true

Option B : b and c are true

Option C : c and d are true

Option D : a and d are true

Option D : a and d are true

MCQ Questions for Class 12 Physics Chapter  Question No 16:

If Vector E and B represent the electric and magnetic fields in an electromagnetic wave, then the direction of propagation of electromagnetic wave will be:

Option A : In the direction of vector E

Option B : In the direction of vector B

Option C : In the direction of vector E X B

Option D : None of these

Option C : In the direction of vector E X B

MCQ Questions for Class 12 Physics Chapter 8 Question No 17:

X-rays were discovered by

Option A : Becquerel

Option B : Roentgen

Option C : Marie Curie

Option D : Von Laue

Option B : Roentgen

MCQ Questions for Class 12 Physics Chapter 8 Question No 18:

The dielectric constant of air is 1.006. The speed of electromagnetic wave travelling in air is a×108  ms -1 where ‘a’ is about

Option A : 3

Option B : 3.88

Option C : 2.5

Option D : 3.2

Option A : 3

MCQ Questions for Class 12 Physics Chapter 9 Question No 19:

Which of the following is called heat radiation?

Option A : X- rays

Option B : Y-rays

Option D : Microwave

MCQ Questions for Class 12 Physics Chapter 9 Question No 20:

From Maxwell’s hypothesis, a charging electric field

Option A : An electric field

Option B : An induced emf

Option C : A magnetic field

Option D : A magnetic dipole

Option C : A magnetic field

CBSE Class 12 Physics Chapterwise MCQ
1 : Electric Charge & Fields MCQs
| 1 to 10 | 11 to 20
2 : Electrostatics Potential and Capacitance MCQs
| 1 to 10 | 11 to 20
3 : Current Electricity MCQs
| 1 to 10 | 11 to 20
4 : Moving charges and Magnetism MCQs
| 1 to 10 | 11 to 20
5 : Magnetism and Matter MCQs
| 1 to 10 | 11 to 20
6 : Electromagnetic Induction MCQs
| 1 to 10 | 11 to 20
7 : Alternating Current MCQs
| 1 to 10 | 11 to 20
8 : Electromagnetic Waves MCQs
| 1 to 10 | 11 to 20
9 : Ray Optics and Optical Instruments MCQs
| 1 to 10 | 11 to 20
10 : Wave Optics MCQs
| 1 to 10 | 11 to 20
11 : Dual Nature of Radiation MCQs
| 1 to 10 | 11 to 20
12 : Atoms MCQs
| 1 to 10 | 11 to 20
13 : Nuclei MCQs
| 1 to 10 | 11 to 20
14 : Semi Conductor Electronics MCQs
| 1 to 10 | 11 to 20
15 : Communication Systems MCQs
| 1 to 10 | 11 to 20