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.
Neutrons are used to induce artificial radioactivity because they
are energetic
have no charge
have no mass
are ionizing
Correct answer is B
No explanation has been provided for this answer.
A nuclide represented as \(^{70}_{32}X\) has a neutron-proton ratio of
0.5
0.8
1.2
1.5
Correct answer is C
\(\frac{38}{32} = 1.2\)
In a cathode ray tube, the function of the x-plates is to
deflect the electron beam horizontally
deflect the electron beam vertically
reflect the electron beam
generate sinusoid waves
Correct answer is A
No explanation has been provided for this answer.
Oxidation of the filament in a light bulb is prevented by the introduction of
hydrogen
oxygen
argon
mercury vapour
Correct answer is C
No explanation has been provided for this answer.
3.63 x 10-19m
6.51 x 10-9m
4.24 x 10-8m
7.25 x 10-8m
Correct answer is C
\(\lambda = \frac{hc}{\frac{1}{2}mv^2} = \frac{6.6 \times 10^{-38} \times 3 \times 10^8}{\frac{1}{2} \times 9.1 \times 10^{-31} (2 \times 10^6)^2}\)
= 4.24 x 10-8m