nda physics quiz work power and energy

Nda physics quiz work power and energy

Choose the appropriate option.

Question 1. A particle is moving freely. Then, its

Kinetic energy is always greater than zero (NA)

Potential energy is greater than zero and kinetic energy is less than zero (NA)

Potential energy is less than zero and kinetic energy is greater than zero (NA)

Potential energy is zero and kinetic energy is less than zero (NA)

1800W (NA)

Choose the appropriate option.

Question 2. Which one among the following happens when a swing rises to a certain height from its rest position

its potential energy decreases while kinetic energy increases (NA)

its kinetic energy decreases while potential energy increases (NA)

Both potential and kinetic energy decreases (NA)

Both potential and kinetic energy increases (NA)

Choose the appropriate option.

Question 3. Conservation of momentum in collision between particles can be understood on the basis of

Newton’s first law of motion (NA)

Newton’s second law of motion (NA)

Both Newton’s second law of motion and Newton’s third law of motion (NA)

Conservation of energy (NA)

Choose the appropriate option.

Question 4. Two similarly charged bodies are kept 5cm apart in air. If the second body is shifted away from the first by another 5cm, their force of repulsion will be

doubled (NA)

halved (NA)

quadrupled (NA)

reduced to one fourth (NA)

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Question 5. An atom of carbon has 6 protons. Its mass number is 12. How many neutrons are present in an atom of carbon?

12 (12)

6 (6)

10 (10)

14 (14)

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Question 6. Which one of the following is not a form of stored energy?

Nuclear energy (NA)

electrical energy (N A)

chemical energy (NA)

potential energy (NA)

Choose the appropriate option.

Question 7. The penetrating power of X rays can be increased by

increasing the current in the filament (NA)

decreasing the potential difference between the cathode and the anode (NA)

decreasing the current in the filament (NA)

increasing the potential difference (NA)

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Question 8. Light waves are

electromechanical waves (NA)

electromagnetic waves (NA)

electro optical waves (NA)

magneto optical waves (NA)

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Question 9. The working of a microwave oven involves

absorption of microwaves by matter ( NA)

reception of microwaves by optical fiber (NA)

microwave amplification by stimulated emission of radiation (NA)

transmission of microwaves through a metal (NA)

Choose the appropriate option.

Question 10. Which one of the following statements is not correct?

The Kelvin scale of temperature is called the absolute scale (NA)

visible light radiation has wavelength range of 400 700nm (NA)

the capacity to do work is called power (NA)

the wavelength of Gamma rays is less than that of X ray (NA)