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.
counting of currency notes with moist fingers is based on the principles of?
diffusion
cohesion
adhesion
viscosity
Correct answer is C
since currency and finger contain unlike molecules, the force involved is adhesion
h =(u)2/g
h = (u)2/4g
h = (2u)2/g
h = (u)2/2g
Correct answer is B
From V2 = U2 + 2as
O = U 2 - 2gH, since at maximum height H, the final velocity, v = O.
when K.E = P.E
∴ H = (U)2/2g
Halfway is the height / 2
PE = KE at (1)/2 H = (U)2 /2g x (1/2) = U2 / 4g
0.01 Hz
0.04 Hz
2.27 Hz
3.60 Hz
Correct answer is D
Frequency = (No. of revolutions)/ Time = (90)/25 = 3.6 Hz
I and II only
I and III only
II and III only
I, II and II only
Correct answer is D
The condition (ii) is a condition for an equilibrium of parallel forces only while conditions (i) and (iii) are correct for both parallel and non- parallel coplanar forces.
No specifications are made, so all conditions apply.
3.6 ms-1
3.77 ms-1
4.0 ms-1
7.5 ms-1
Correct answer is B
V = wr = 2πf r = 2 x (22)/7 x 1 x 0.6
= 3.77ms-1