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.
A stroboscope can be used to make the wave appear ………….
Stationary
In motion
Dipper
Ripple
Correct answer is A
Stroboscope is a scientific instrument used to make a wave appears stationary when used
There is an explanation video available below.
What is the inductance (L) of an inductor whose reactance is 1Ω at 50/ π hertz (H)?
100 H
0.01H
10H
1H
Correct answer is B
XL = WL = 2πFL (w = 2πf)
XL = reactance inductor (S.I unit Ω)
L = inductance (L) in Henry
XL = 1Ω, f = 50/π, L = ?
1 = 2× π × 50/π × L
1 = 100L
i.e. 100L = 1
L = 1/100
0.01H
∴ Inductance (L) of a inductor = 0.01H
There is an explanation video available below.
The direction of the path taken by light is called
Locus
Lines
Ray
Beam
Correct answer is C
Ray – a beam of light or radiation
There is an explanation video available below.
P1V1= P2V2
V1 = V2 ÷ T1T2
P1T1 = P2T2
P1V1 ÷ T1 = P1V1 ÷ T2
Correct answer is A
Boyle‘s law stats that the volume of a given mass of a gas, at a constant temperature is inversely proportional to us pressure.
Mathematically
V ∝ l/p, v = k/p (where k is constant)
K = VP
Let k = k1
Then, if k = k, V and P = V1P1
V1P1 = V2P2
There is an explanation video available below.
36.2cm3
25.7cm3
72.8cm3
24.3cm3
Correct answer is C
General formular of Gas laws
(P1V1) ÷ T1= (P2V2) ÷ T2
P1 = 800mmHg, V, = 76cm3, Tr = 273 + 27 = 300k
P2 = 760mmHg, V2 = ? T2= 273 + 0 = 273
(800 × 76) ÷ 300 = (760 × V2) ÷ 273
V2 = (300 × 76 × 273) ÷ (300 × 760) = 72.8 cm3
The volume of gas as S.T.P = 72.8 cm3
There is an explanation video available below.