NDA General Ability 4 September 2022 | Physics Question 345 | General Science

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NDA General Ability 4 September 2022

MCQ (Single Correct Answer)

-1.33

SONAR is a device that is used to measure the distance of underwater objects by a ship. Which of the following types of waves does it use for this purpose?

Infrasonic waves

Sound waves in audible range for human beings

Ultrasonic waves

All of the above

NDA General Ability 4 September 2022

MCQ (Single Correct Answer)

-1.33

Which one of the following statements about the speed of sound waves is not correct?

The speed of sound waves in steel is higher than that in water.

The speed of sound waves in air decreases with increase in temperature.

The speed of sound waves in air increases with increase in temperature.

The speed of sound waves in water is higher than that in air.

NDA General Ability 4 September 2022

MCQ (Single Correct Answer)

-1.33

Which one of the following metals is most commonly used for making filament of incandescent electric bulbs?

Aluminium

Silver

Copper

Tungsten

NDA General Ability 4 September 2022

MCQ (Single Correct Answer)

-1.33

A bullet of mass 10 g is horizontally fired with velocity 300 m s^-1 from a pistol of mass 1 kg. What is the recoil velocity of the pistol?

0.3 m s^-1

3 m s^-1

-3 m s^-1

-0.3 m s^-1

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Questions Asked from Marks 4

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