Fill In The Blanks[1 Marks ]

Question 11 Mark

The ratio of the strength of the four fundamental forces in nature $F_G: F_W: F_E: F_S$ is ______.

Answer

The ratio of the strength of the four fundamental forces in nature $F_G: F_W: F_E: F_S$ is $1: 10^{25}: 10^{36}: 10^{38}$.

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Question 21 Mark

Branch of science that deals with the nature and propagation of light _______.

Answer

Branch of science that deals with the nature and propagation of light Optics.

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Question 31 Mark

Indian scientist Dr. C.V. Raman was awarded noble prize for discovery of _______.

Answer

Indian scientist Dr. C.V. Raman was awarded noble prize for discovery of Inelastic scattering of light.

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Question 41 Mark

Fundamental forces that obey inverse square law are ______ and ______.

Answer

Fundamental forces that obey inverse square law are Electromagnetic force and Gravitational force.

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Question 51 Mark

_______ unified electromagnetism and optics by discovering that light is an electromagnetic wave

Answer

James Clerk Maxwell unified electromagnetism and optics by discovering that light is an electromagnetic wave.

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Question 61 Mark

Strong Nuclear force is caused by exchange of elementary particles called _______.

Answer

Strong Nuclear force is caused by exchange of elementary particles called $\pi - \text{mesons}$

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Question 71 Mark

Linear momentum of a body remain conserved when there is no external ______ acts on the body.

Answer

Linear momentum of a body remain conserved when there is no external Force acts on the body.

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Question 81 Mark

Electromagnetic and Gravitational forces are always act along the line joining two body, this implies their ______ nature.

Answer

Electromagnetic and Gravitational forces are always act along the line joining two body, this implies their Central force nature.

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Question 91 Mark

Practical application of natural laws is known as _______.

Answer

Practical application of natural laws is known as Technology.

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Question 101 Mark

Rocket propulsion is based on the scientific principle of ______.

Answer

Rocket propulsion is based on the scientific principle of Newton's laws of motion.

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Question 111 Mark

_______ is an attempt to explain various physical in terms of just few concepts and laws.

Answer

Unification is an attempt to explain various physical in terms of just few concepts and laws.

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Question 121 Mark

Domain of physics that deals with macroscopic phenomenon is known as ______.

Answer

Domain of physics that deals with macroscopic phenomenon is known as Classical Physics.

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Question 131 Mark

Angular momentum of a body rotating about an axis remain conserved if and only if ______ is zero.

Answer

Angular momentum of a body rotating about an axis remain conserved if and only if External torque is zero.

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Question 141 Mark

Optical fibres works on the Principle of _______.

Answer

Optical fibres works on the Principle of Total internal reflection.

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Question 151 Mark

Gravitational force between two bodies is caused by exchange of particles called _______.

Answer

Gravitational force between two bodies is caused by exchange of particles called Gravitation.

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Physics Fill In The Blanks[1 Marks ]

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