999+ Physics Questions Answers Explanation MCQ

Q:

The laws which govern the motion of planets are called ___________________.

A) Newton's Laws	B) Kepler's Laws
C) Avogadro's laws	D) De Morgan's Laws

Answer & Explanation Answer: B) Kepler's Laws

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Q:

What is the unit of the physical quantity Entropy?

A) watt per kelvin	B) newton per kelvin
C) pascal per kelvin	D) joule per kelvin

Answer & Explanation Answer: D) joule per kelvin

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Q:

Which of the following is false with reference to a photo-voltaic cell?

A) It is another name as solar cell	B) It can be used as infra-red detectors
C) It can store light energy in the form of electrical energy	D) It converts electric energy into light energy

Answer & Explanation Answer: D) It converts electric energy into light energy

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Q:

Which of the following is an example of thermoplastics?

A) Bakelite	B) Melamine
C) PVC	D) No option is correct

Answer & Explanation Answer: C) PVC

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Q:

In the equation of motion $2 as = v^{2} - u^{2}$ , s represents _________________.

A) speed	B) displacement
C) velocity	D) acceleration

Answer & Explanation Answer: B) displacement

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Q:

Which of the following is NOT an application of Fiber optics?

A) Power Generation	B) Computer Networking
C) Sensors	D) Power Transmission

Answer & Explanation Answer: A) Power Generation

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Q:

A broadcasting station transmits waves with a frequency of $71 x 10^{4}$ Hz and a speed of $3 x 10^{8}$ m/s. The wavelength of the wave is

A) 324.6 m	B) 422.5 m
C) 208.4 m	D) 418.8 m

Answer & Explanation Answer: B) 422.5 m

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Q:

Borosilicate glass wear is used in microwave oven because

A) It is not brittle	B) It is highly heat resistant
C) It cooks faster than any other vessel	D) It is energy efficient

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