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.
18.57NC\(^{-1}\)
53.06N C\(^{-1}\)
2.28NC\(^{-1}\)
0.80NC\(^{-1}\)
Correct answer is A
Electric Field Intensity (E) = \(\frac{v}{d}\)
= \(\frac{\text{potential difference}}{\text{distance}}\)
= \(\frac{6.5v}{35cm}\)
= \(\frac{6.5}{35 \times 10^{- 2}}\)
= 18.57NC\(^{-1}\)
Which of the following is not an electromagnetic radiation?
x - ray
Radio waves
sunlight
sound waves
Correct answer is D
Electromagnetic waves do not require any material medium, but sound waves is a mechanical wave that require a material medium
Which is the incorrect formula for a body accelerating uniformly?
a = v2 − \(\frac{u^2}{2}\)
v2 = u2 + 2as
s = ut + \(\frac{1}{2}\) at2
v2 − u2= 2as
Correct answer is A
Look through the equations of motion
72o
100o
120o
144o
Correct answer is D
The diagram given simple illustrates that a pentagon contains three \(\Delta\)s.
Two angles which are in the ratio 2:3 will have actual values 2xo, 3xo respectively. Thus 2xo + 3xo + 3 x 60 = 3x sum of angles of \(\Delta\)a
i.e. 5xo + 180o = 3 x 180o
5xo + 180o = 540o
5xo = 540o - 180o
5xo = 360o
xo = \(\frac{360^o}{5}\)
= 72o
Hence, the smaller of the two angles is
2 x 72o = 144o
\(\Delta\)x . \(\Delta\)p = h
\(\Delta\)x . \(\Delta\)p \(\leq\) = h
\(\Delta\)x . \(\Delta\)p \(\geq\) = h
\(\Delta\)x . \(\Delta\)p > h
Correct answer is C
No explanation has been provided for this answer.