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.
Which of the following statements about photoelectrons is correct?
A faint green light produces photoelectrons with less kinetic energy than a bright red light
A red light releases a smaller number of electrons than a green light
A faint green light produces photoelectrons with greater kinetic energy than a bright red light
A red light produces more photoelectrons than a green light
Correct answer is B
No explanation has been provided for this answer.
\(\frac{2me}{B\pi}\)
\(\frac{2B}{me\pi}\)
\(\frac{2\pi m}{Be}\)
\(\frac{Be}{2 \pi m}\)
Correct answer is C
Motion of charged particles in Magnetic field
qvb = \(\frac{Mv^2}{r}\)
where q = e
Introducing Period (T) as time taken to complete one orbit = \(\frac{2πM}{qe}\)
Which of the following statements about the motion of a simple pendulum is true?
It is a simple harmonic motion when the angle of displacement is large
It passes the equilibrium position with minimum speed
It possesses maximum kinetic energy at the extreme positions
lt swings faster at the poles than at the equator
Correct answer is D
No explanation has been provided for this answer.
50K
120 K
200K
393K
Correct answer is B
No explanation has been provided for this answer.
108ms\(^2\)
86ms\(^2\)
4ms\(^2\)
2ms\(^2\)
Correct answer is D
where u = o m/s, t = 10s,
v = 72kmhr\(^{-1}\) ---> (72 X 1000) / 3600
: v = 20 m/s
Acceleration (a) = ( v - u ) / t ---> (20 - 0) / 10
: a = 2m/s\(^2\)