Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
20N
25N
40N
100N
Correct answer is C
VR = 5:1 or 5
Load = 20kg or 200N
MA = \(\frac{200}{E}\)
Efficiency% = \(\frac{MA}{VR} * 100\)
100% = \(\frac{200}{5E} * 100\)
5E = 200
E = 40
erect and of the same size as the object
laterally inverted and of the same size as the object
erect and bigger than the object
virtual and if the same size
Correct answer is C
Images formed by plane mirrors are virtual, upright, left-right reversed, the same distance from the mirror as the object's distance, and the same size as the object
An example of a mechanical wave is---------
water waves
radio waves
x-rays
light rays
Correct answer is A
A mechanical wave is a wave that is an oscillation of matter.
A sound wave is a mechanical wave that propagates along or through a medium by particle-to-particle interaction.
Sound waves, water waves and seismic waves are some examples of mechanical waves mechanical wave.
I only
I and II only
I, II, and III only
I and III
Correct answer is C
The kinetic-molecular theory of gases assumes that ideal gas molecules:
(1) are constantly moving;
(2) have negligible volume;
(3) have negligible intermolecular forces;
(4) undergo perfectly elastic collisions; and
(5) have an average kinetic energy proportional to the ideal gas's absolute temperature.
Kg m\(^{2}\) s\(^{-1}\)
Kg\(^{2}\) m s\(^{-2}\)
Kg m\(^{2}\) s\(^{-2}\)
Kg m s\(^{-1}\)
Correct answer is C
Joule as the unit of work done or energy used.
Force = mass × acceleration
Work = Force × Distance
Work = mass x acceleration x distance
Joule = kg × \(\frac{m}{s^2}\) × m
→ kg m\(^2\) s\(^{-2}\)