Physics Questions

Q:

The taper on the lathe spindle is

A) 1 in 10 B) 1 in 20
C) 1 in 15 D) 1 in 25
 
Answer & Explanation Answer: B) 1 in 20

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Q:

If an object moves with constant velocity,

A) it must have constant speed B) it must have constant direction
C) it must have constant speed in constant direction D) None of the above
 
Answer & Explanation Answer: C) it must have constant speed in constant direction

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Q:

In spherical polar coordinates (l, q, a), q denotesthe polar angle around z-axis and a denotes the azimuthal angle raised from x-axis . Then the y-component of P is given by

A) Psinq sina B) Psinq cosa
C) Pcosq sina D) Pcosq cosa
 
Answer & Explanation Answer: A) Psinq sina

Explanation:

The Cartesian Coordinates can be retrieved from spherical coordinates (l,q,a) by:

X = r.sinq.cosa

Y = r.sinq.sina

Z = r.sinq

Using the same we get for P,

Y = P.sinq.sina

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Q:

What type of electromagnetic radiation is used in the remote control of a television?

A) Ultraviolet B) Visible
C) Infrared D) None of the above
 
Answer & Explanation Answer: C) Infrared

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Q:

If you look into a mirror and find that the image (your reflection) is smaller than you, then the type of the mirror is:

A) concave mirror B) convex mirror
C) plano-concave mirror D) plane mirror
 
Answer & Explanation Answer: B) convex mirror

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Q:

Thermohaline circulation is mainly due to

A) cold, dense ocean water sinking and warmer water replacing it B) winds causing circulation of ocean water
C) warmer, less dense water sinking in the ocean and cold water replacing it D) warm water being added to the ocean due to industial waste
 
Answer & Explanation Answer: A) cold, dense ocean water sinking and warmer water replacing it

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Q:

The magnitude of buoyant force depends on the .......... of the fluid.

A) mass B) temperature
C) volume D) density
 
Answer & Explanation Answer: D) density

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Q:

An object having the capability to do work is said to possess

A) Inertia B) Force
C) Pressure D) Energy
 
Answer & Explanation Answer: D) Energy

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