## Electromagnetic waves-MCQ-Basic

Physics is an important subject in preparation for various Competitive exams.To keep a track of your preparation we have designed a small quiz of 10 Basic Level Questions on Electromagnetic waves. You have 10 minutes to solve the quiz, click the start timer button in order to start the timer and then click on submit button at the end to submit the quiz and view your scores and correct answers.

Q1. The speed of electromagnetic wave in vacuum depends upon the source of radiation

•  Increases as we move from Î³ -rays to radio waves
•  Decreases as we move from Î³-rays to radio waves
•  Is same for all of them
•  None of these

Is same for all of them

Q2. Which of the following radiations has the least wavelength

•  Î³ -rays
•  Î² -rays
•  Î± -rays
•  X-rays

Î³ -rays

Q3. The maximum distance upto which TV transmission from a TV tower of height h can be received is proportional to

•  h 1 / 2
•  h
•  h 3
•  h 2

h 1 / 2

Q4. In short wave communication, waves of which of the following frequencies will be reflected back by the ionospheric layer having electron density 10 11 per m 3

•  2.8 MHz
•  10 MHz
•  12 MHz
•  18 MHz

2.8 MHz

Q5. Which of the following are not electromagnetic waves

•  Cosmic rays
•  Gamma rays
•  Î²-rays
•  X-rays

Î²-rays

Q6. Ozone is found in

•  Stratosphere
•  Ionosphere
•  Mesosphere
•  Troposphere

Stratosphere

Q7. The electromagnetic waves travel with a velocity

•  Equal to velocity of sound
•  Equal to velocity of light
•  Less than velocity of light
•  None of these

Equal to velocity of light

Q8. The ozone layer absorbs

•  X-rays
•  Î³ -rays

Q9. Electromagnetic radiation of highest frequency is

•  Î³ -rays

Î³ -rays

Q10. Which of the following shows green house effect

•  Ultraviolet rays
•  Infrared rays
•  X-rays
•  None of these

Infrared rays

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