Physics Questions

Q:

1 kW = ?

A) 1000 W B) 10 W
C) 100 W D) 10000 W
 
Answer & Explanation Answer: A) 1000 W

Explanation:
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Q:

The SI unit of resistance is:

A) Newton B) Coulomb
C) Ohm D) Joule
 
Answer & Explanation Answer: C) Ohm

Explanation:
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Q:

The fact that the planets move around the Sun, not in circles but in ellipses, was first demonstrated by

A) Galileo B) Martin Luther
C) Johannes Kepler D) Copernicus
 
Answer & Explanation Answer: C) Johannes Kepler

Explanation:

Kepler’s  laws  of  planetary  motion state  that  (a)  All  planets  move  in elliptical orbits with the Sun at one of  the  focal  points  (b)  The  radius vector  drawn  from  the  sun  to  a planet  sweeps  out  equal  areas  in equal  time  intervals.  This  follows from  the  fact  that  the  force  of gravitation on the planet is central and  hence  angular  momentum  is conserved.  (c)  The  square  of  the orbital   period   of   a   planet   is proportional  to  the  cube  of  the semi  major  axis  of  the  elliptical orbit of the plane.

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Q:

A body is initially moving with a velocity of 10 m/s. It undergoes an acceleration of 2 m/s2 for 5 seconds. Find the displacement (in m) of this body in these 5 seconds.

 

A)  25 B)  37.5
C)  50 D)  75
 
Answer & Explanation Answer: D)  75

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Q:

The shortest distance measured from the initial to the final position of an object is known as the _________________.

A) motion B) direction
C) velocity D) displacement
 
Answer & Explanation Answer: D) displacement

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Q:

The basic Speed Law means

Answer

The Basic Speed Law states that you must never drive faster than is safe for present conditions, regardless of the posted speed limit.


For example, if you are driving 60 kmph in 45 kmph zone, you are not in safe driving and you just not following the speed law.

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0 1494
Q:

The energy associated with motion is called

A) Potential energy B) Kinetic energy
C) Both A & B D) Stored energy
 
Answer & Explanation Answer: B) Kinetic energy

Explanation:

Energy can be either potential or kinetic. The energy associated with motion is called Kinetic energy and similarly, the energy associated with position is called Potential energy.

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Q:

What is the process of conversion of solid state directly to gaseous state called?

A) Evaporation B) Condensation
C) Sublimation D) Distillation
 
Answer & Explanation Answer: C) Sublimation

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