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.
3.0 cm
8.0 cm
12.0 cm
16.0 cm
Correct answer is C
Magnification = (image height)/object height
= (lenght camera)/object distance from pin-hole
∴(2)/4 = (6)/X
X (4 x 6)/2 = 12 cm
I and IV only
II and IV only
I and III only
III and IV only
Correct answer is D
Due to rectilinear propagation of light we have ecslipse which occur as a result relative motion of the earth, sun and moon
wavelength
harmonics
frequency
velocity
Correct answer is C
Timber/ quality depends on the overtones or harmonics, and timber is a characteristic property of source of sound,
A harmonic is a wave with a frequency that is a positive integer multiple of the fundamental frequency,
These rest on the fundamental property of FREQUENCY.
Given the progressive wave equation y = 5 sin (2000 πt - 0.4x), calculate wave length
12.4 m
15.7 m
17.5 m
18.6 m
Correct answer is B
Comparing y = 5sin (200 πt - 0.4X) with the wave equation y = A sin (wt -KX) K = (2π)/λ = 0.4
∴ λ = (2π)/0.4 = 15.7M
In a good thermos flask, heat loss is reduced through the following features EXCEPT?
the lens surface
the insulating cork
silvered walls
the cork lid
Correct answer is A
The silver coating on the inner bottle of a thermos flask is used to prevent heat transfer by radiation