Physics Questions

Q:

If ice floating on water in a vessel melts, the water level in the vessel _______.

A) increases B) does not change
C) first increases before decreasing D) decreases
 
Answer & Explanation Answer: B) does not change

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Q:

In the gamma decay of a nucleus

A) the mass number of the nucleus changes whereas its atomic number does not change B) the mass number of the nucleus does not change whereas its atomic number changes
C) both the mass number and the atomic number of the nucleus change D) neither the mass number nor the atomic number of the nucleus changes
 
Answer & Explanation Answer: D) neither the mass number nor the atomic number of the nucleus changes

Explanation:

The emission of gamma rays does not alter the number of protons or neutrons in the nucleus but instead has the effect of moving the nucleus from a higher to a lower energy state (unstable to stable)

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Q:

Soap bubble attains spherical shape due to ______.

A) inertia B) pressure
C) surface tension D) Viscosity
 
Answer & Explanation Answer: C) surface tension

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Q:

How can we measure specific gravity of milk?

A) Using a viscometer B) Using an odometer
C) Using a hygrometer D) Using a hydrometer
 
Answer & Explanation Answer: D) Using a hydrometer

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Q:

Nautical miles is a unit of distance used in

A) Navigation B) Road mile
C) Astronomy D) Measuring the boundaries of a nation
 
Answer & Explanation Answer: A) Navigation

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Q:

Momentum is measured as the product of :

A) Mass and inertia B) Mass and force
C) Mass and velocity D) Mass and acceleration
 
Answer & Explanation Answer: C) Mass and velocity

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Q:

Find the power of a convex lens if the image formed is at a distance of 16 cm from the lens when the object is placed on the other side of the lens at 20 cm from the optical centre?

A) -3.75 diopters B) -11.25 diopters
C) 3.75 diopters D) 11.25 diopters
 
Answer & Explanation Answer: D) 11.25 diopters

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Q:

In the context of non­-conventional energy, what is the meaning of 'OTE' ?

A) Ocean Tidal Energy B) Ocean Thermal Energy
C) Ocean Tidal Electricity D) Other Thermal Energy
 
Answer & Explanation Answer: B) Ocean Thermal Energy

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