Physics Questions

Q:

The image of an object formed on the retina of the eye is 

A) virtual and upright B) virtual and inverted
C) real and inverted D) Real and upright
 
Answer & Explanation Answer: C) real and inverted

Explanation:

Although  the image is inverted the mental interpretation of the effect on the retina is as though it is erect

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Q:

The information of brilliant colors in a thin soap film is a consequence of the phenomena of

A) Polarization and interference B) Diffraction and dispersion
C) Multiple refraction and dispersion D) Multiple reflection and interference
 
Answer & Explanation Answer: D) Multiple reflection and interference

Explanation:
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Q:

Energy is continuously generated in the sun due to

A) Nuclear fusion B) Nuclear fission
C) Radioactivity D) Artificial radioactivity
 
Answer & Explanation Answer: A) Nuclear fusion

Explanation:
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Q:

The direction of heat flow between two objects depends on

A) Their masses B) Their heat contents
C) Their temperatures D) Whether they are in solid, liquid or gaseous state
 
Answer & Explanation Answer: C) Their temperatures

Explanation:

Heat always flows from a body at higher temperature to a body at a lower temperature.

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Q:

The rotational effect of a force on a body about an axis of rotation is described in terms of

A) Centre of gravity B) Centripetal force
C) Centrifugal force D) Moment of force
 
Answer & Explanation Answer: D) Moment of force

Explanation:
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Q:

1 kWh = __________ × 106J.

 

A) 36 B)  3.6  
C) 6.4   D) 64
 
Answer & Explanation Answer: B)  3.6  

Explanation:
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Q:

One astronomical unit is the average distance between

A) Earth and the Sun B) Earth and the Moon
C) Jupiter and the Sun D) Pluto and the Sun
 
Answer & Explanation Answer: A) Earth and the Sun

Explanation:
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30 10142
Q:

Which of the following is a scalar quantity

A) electric current B) electric field
C) Acceleration D) linear momentum
 
Answer & Explanation Answer: A) electric current

Explanation:

A Scalar quantity is a quantity that has only magnitude but no direction as like vector. 

Here in the given options, electric current is the only one which is scalar.

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