NDA General Ability 18 April 2021 | Physics Question 391 | General Science

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NDA General Ability 18 April 2021

MCQ (Single Correct Answer)

-1.33

'Beats' is a phenomenon that occurs when frequencies of two harmonic waves are

equal

far apart

multiples of each other

nearly same

NDA General Ability 18 April 2021

MCQ (Single Correct Answer)

-1.33

Light waves are incident on an air-glass boundary. Some of the light waves are reflected and some are refracted in the glass. Which one of the following properties is the same for the incident wave and the refracted wave?

Speed

Direction

Brightness

Frequency

NDA General Ability 18 April 2021

MCQ (Single Correct Answer)

-1.33

Which one of the following statements is true for a simple harmonic oscillator?

Force acting is directly proportional to the displacement from the mean position and is in same direction.

Force acting is directly proportional to the displacement from the mean position and is in opposite direction

Acceleration of the oscillator is constant

The velocity of the oscillator is not periodic

NDA General Ability 18 April 2021

MCQ (Single Correct Answer)

-1.33

Which one of the following colours may be obtained by combining green and red colours?

Blue

Magenta

Pink

Yellow

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