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Q1. Study of internal structure of earth is _________

• Electricity and magnetism
• Mechanics
• Geophysics
• Thermodynamics

Solution

Study of internal structure of earth is geophysics.

Q2. On which laws is the principle of rocket propulsion based?

• Newton's law of gravitation
• Newton's first law of motion
• Newton's second and third laws of motion
• Laws of thermodynamics

Solution

Newton's second and third laws explain rocket propulsion.

Q3. Gravitational, weak nuclear, electromagnetic and strong nuclear forces are

• Classical physics
• Modern physics
• Fundamental forces
• Derived force

Solution

Gravitational, weak nuclear, electromagnetic and strong nuclear forces are the four fundamental forces of physics

Q4. Which is the strongest fundamental force of nature?

• Gravitational force
• Electromagnetic force
• Strong nuclear force
• Weak nuclear force

Solution

The strong nuclear force is the strongest fundamental force in nature.

Q5. The wave nature of electrons is used in which of the following devices?

• Photocell
• Electron microscope
• Tokamak
• Aeroplane

Solution

Electron microscope uses the wave nature of electrons for its functioning.

Q6. According to Einstein's theory, mass and energy are related as

• E = m c
• E = m/c²
• E = m/c
• E = mc²

Solution

Mass and energy are equivalent according to Einstein's theory. They are related as E = mc²

Q7. Who discovered radioactivity?

• Einstein
• Becquerel
• Newton
• C.V. Raman

Solution

Becquerel, Marie Curie and Pierre Curie discovered radioactivity.

Q8. Which scientist does not belong to Germany?

• Roentgen
• Hertz
• Werner Heisenberg
• Niels Bohr

Solution

Niels Bohr belongs to Denmark

Q9. Which force operates among the heavier elementary particles?

• Gravitational force
• Strong nuclear force
• Weak nuclear force
• Electromagnetic force

Solution

Strong nuclear force operates among the heavier elementary particles and the nucleons.

Q10. ___________  are the forces that bind the neutrons and protons together in a nucleus.

• Protonic forces
• Nuclear forces
• Dueteronic forces
• Electromagnetic force

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