Physics/CBES Board(Class 12-Physics)MCQ Questions with Answers(Chapter 8 Electromagnetic Waves) Sample Test,Sample questions

Question:
An electromagnetic wave can be produced, when charge is

1.moving with a constant velocity

2.moving in a circular orbit

3.falling in an electric field

4.both (2) and (3)


Question:
If a variable frequency ac source is connected to a capacitor then with decrease in frequency the displacement current will

1.increase

2.decrease

3.remains constant

4.first decrease then increase


Question:
Maxwell in his famous equations of electromagnetism introduced the concept of

1.ac current

2.displacement current

3.impedance

4.reactance


Question:
The conduction current is same as displacement current when source is

1.ac only

2.dc only

3.either ac or dc

4.neither dc nor ac


Question:
The ultra high frequency band of radio waves in electromagnetic wave is used as in

1. television waves

2. cellular phone communication

3. commercial FM radio

4.both (1) and (2)


Question:
The waves used by artificial satellites for communication is

1.microwaves

2. infrared waves

3.radio waves

4.X-rays


Question:
Which of the following electromagnetic waves is used in medicine to destroy cancer cells?

1.IR-rays

2.Visible rays

3.Gamma rays

4.Ultraviolet rays


Question:
Which of the following has/have zero average value in a plane electromagnetic wave?

1.Both magnetic and electric fields

2.Electric field only

3.Magnetic field only

4.None of these


Question:
Which of the following statement is false for the properties of electromagnetic waves?

1.Both electric and magnetic field vectors attain the maxima and minima at the same place and same time.

2.The energy in electromagnetic waves is divided equally between electric and magnetic field vectors.

3.Both electric and magnetic field vectors are parallel to each other and perpendicular to the direction of propagation of wave.

4.These waves do not require any material medium for propagation.


More MCQS

  1. Physics nobel prize winners
  2. CBES Board(Class 12-Physics)MCQ Questions with Answers(Chapter -1 Electric Charges and Fields)
  3. CBES Board(Class 12-Physics)MCQ Questions with Answers(Chapter 2 Electrostatic Potential and Capacitance)
  4. CBES Board(Class 12-Physics)MCQ Questions with Answers(Chapter 3 Current Electricity)
  5. CBES Board(Class 12-Physics)MCQ Questions with Answers(Chapter 4 Moving Charges and Magnetism)
  6. CBES Board(Class 12-Physics)MCQ Questions with Answers(Chapter 5 Magnetism and Matter)
  7. CBES Board(Class 12-Physics)MCQ Questions with Answers(Chapter 6 Electromagnetic Induction)
  8. CBES Board(Class 12-Physics)MCQ Questions with Answers(Chapter 7 Alternating Current)
  9. CBES Board(Class 12-Physics)MCQ Questions with Answers(Chapter 8 Electromagnetic Waves)
  10. CBES Board(Class 12-Physics)MCQ Questions with Answers(Chapter 9 Ray Optics and Optical Instruments)
  11. CBES Board(Class 12-Physics)MCQ Questions with Answers(Chapter 10 Wave Optics)
  12. CBES Board(Class 12-Physics)MCQ Questions with Answers(Chapter 11 Dual Nature of Radiation and Matter)
Search
R4R Team
R4Rin Top Tutorials are Core Java,Hibernate ,Spring,Sturts.The content on R4R.in website is done by expert team not only with the help of books but along with the strong professional knowledge in all context like coding,designing, marketing,etc!