Physics MCQs:

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"The master is not the one who teaches; it's the one who suddenly learns."

― Guimarães Rosa

Science-Physics-Multiple Choise Questions & Answers

প্রতিটি প্রশ্নের জন্য চারটি করে উত্তর থাকবে যার একটি সঠিক, বামদিকে A, B, C এবং D এর উপর ক্লিক করে সঠিক উত্তরটি দেখতে পারেন। যদি উত্তর সঠিক হয় তবে অপশনটির ডান দিকে টিক () আর উত্তর ভূল হলে ক্রস () চিনহ প্রদ্ররশিত হবে।

#: 71. Which of the following correctly represents the law of refraction?

A.

c = n ÷ v

B.

v = n ✖ c

C.

n = v ✖ c

D.

n = c ÷ v

#: 72. The speed of a sound wave is ___________ in water.

A.

344 m/s

B.

1,320 m/s

C.

1,236 m/s

D.

768 m/s

#: 73. Speed of the sound is lest in which medium of the following?

A.

water

B.

Steel

C.

Air

D.

Vacuum

#: 74. Which statement is not correct for the definition of sound wave?

A.

Sound waves are created by the vibration of some object.

B.

Speed of it is lest in air.

C.

Sound waves have wavelength, frequency, speed and amplitude.

D.

It easily travels in a vacuum.

#: 75. Intensity of sound has____________.

A.

a subject existence

B.

no any existence

C.

an object existence

D.

both subjective and objective existence

#: 76. Rarefactions are formed where ___________.

A.

air pressure is zero

B.

air pressure is lower

C.

air pressure is normal

D.

air pressure is higher

#: 77. The distance between peaks (high points) is called _____________.

A.

amplitude

B.

frequency

C.

wavespeed

D.

wavelength

#: 78. Which one of the following is a good example of sound waves?

A.

Elastic band

B.

Elastic rod

C.

Slinky spring

D.

Rope

#: 79. In the equation of λν=c, where λ is the wavelength, ν is the frequency, what does 'c' stand for?

A.

The speed of light

B.

The constant

C.

The covexity of light

D.

The reflextion of light

#: 80. What does the 'n' stand for in PV=nRT?

A.

The amount of substance of gas

B.

The number of neutron of gas

C.

The atomic number of gas

D.

All the above

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