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.
0.4\(\pi\) rads-2
0.8\(\pi\) rads-2
1.3\(\pi\) rads-2
20.0\(\pi\) rads-2
Correct answer is B
From the radiation:
V = +at, and if it starts from N & T, U = 0
And for angular motion, W = O + at
4R = aχ5
∴ a = (4a)/5 = 0. 8\(\pi\) rads-2
The unit of moment of a couple can be expressed in?
N m-1
N m-2
N m
N m2
Correct answer is C
The unit of a couple is Newton-meter (N M)
37.50 cm
75.00 cm
18.75
25.00 cm
Correct answer is A
The least distance of distinct vision required = 25 cm.
∴ for the person to see an object clearly at 25 cm from the eye, the image must be formed at 75 cm on the same side of lens, at his near point.
∴ U = 25 cm; V = -75 cm (image should be virtual)
thus (1)/f = (1)/v +(1)/u
= (1)/75 + (1)/25
=(-1 + 3)/75 = (2)/75
∴f = (75)/2 = 37.50
The wavelength of the first overtone of a note in a closed pipe of length 33 cm is?
33 cm
44 cm
22 cm
17 cm
Correct answer is B
In a closed tube, the fundamental note occurs when the length of the tube l = (λ)/4,
the first over tone occurs when the length of the tube l = (3)/4λ.
λ = (4)/3 l = (4)/3 x (33)/T = 44 cm
Non-luminous object can be seen because they
reflect light
are near
are polished
emit light
Correct answer is A
No explanation has been provided for this answer.