physics

The S.I unit of power is?

A. N B. Pa C. W D. J Correct Answer: Option C C. W

6 years ago

A device that converts mechanical energy into electrical energy is?

A. a dynamo B. an electric motor C. an induction coil D. a transformer Correct Answer: Option A A. a…

6 years ago

The period of a simple pendulum X is 5s. What is the period of a simple pendulum Y which makes 50 vibrations in the same time it takes X to make 20 vibrations?

A. 12.5s B. 2.5s C. 2.0s D. 1.2s Correct Answer: Option A A. 12.5s Explanation Tx=20/5=4s Ty=50/4=12.5s

6 years ago

The diagram above illustrates a uniform metre rule which is balanced on a pivot by some masses. Calculate the value of M

A. 500.0g B. 400.0g C. 44.4g D. 25.0g Correct Answer: Option D D. 25.0g Explanation clockwise moment = Anti-clock wise…

6 years ago

A car starts from rest and covers a distance of 40m in 10s. Calculate the magnitude of its acceleration?

A. 0.25 ms‾² B. 0.80 ms‾² C. 3.20 ms‾² D. 4.00 ms‾² Correct Answer: Option B Explanation S = ut…

6 years ago

The knowledge of surface tension is applied in the following areas except in?

A. manufacturing of rain coats B. production of palm oil C. floating of a needle on water D. washing of…

6 years ago

Which of the following pairs of physical quantities is made up of vectors?

A. speed and displacement B. mass and force C. displacement and acceleration D. momentum and length Correct Answer: Option C…

6 years ago

If no net force acts on an object, the object maintains a state of rest or constant speed in a straight line. The above is a statement of Newton’s?

A. first law of motion B. second law of motion C. third law of motion D. law of universal gravitation…

6 years ago

When the linear momentum of a body is constant, the net force acting on it?

A. is zero B. increases C. decreases D. remains constant Correct Answer: Option A A. is zero

6 years ago