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 note of frequency of 2000Hz has a velocity of \(400ms^{-1}\). What is the wavelength of the note?
800m
200m
5m
2m
0.2m
Correct answer is E
\(\lambda = \frac{v}{f} = \frac{400}{2000} = 0.2\)m
0.8 x \(10^{-7}\)m
1 x \(10^{-7}\)m
2.3 x \(10^{-7}\)m
3.8 x \(10^{-7}\)m
12.4 x \(10^{-7}\)m
Correct answer is C
\(\theta = E - E_f = h_f = \frac{v}{\lambda} \Rightarrow = \lambda = \frac{h_v}{\theta}
\frac{6.6\times 10^{-34} \times 3 \times 10^{8}}{8.6 \times 10^{-19}} = 0.8 \times 10^{-7}\)m
0.75 days
2.58 days
4 days
4.80 days
6 days
Correct answer is D
64g → 32g → 16g → 8g → 4g → 2g
Half life time= 24/5 = 4.8 days
When an atom loses or gains a charge, it becomes an
ion
an electron
a neutron
a proton
a deuteron
Correct answer is A
No explanation has been provided for this answer.
Which of the following substances is not an insulator?
Aluminium
Glass
Plastic
Clay
Cork
Correct answer is A
No explanation has been provided for this answer.