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.
9.0 x 10-24m
4.55 x 10-17m
7.25 x 10-11m
6.20 x 10-8m
Correct answer is C
\(\lambda = \frac{hc}{\frac{1}{2}mv^2}\)
= \(\frac{6.6 x 10^{-34} \times 3 \times 10^8}{0.5 \times 9.1 \times 10^{-3} (10^7)^2}\)
= 7.25 x 10-11m
The main difference between between x-rays and \(\gamma-rays\) lies in their
ionizing ability
absorption rate
mode of production
mode of propagation
Correct answer is D
No explanation has been provided for this answer.
atomic numbers
nucleon numbers
proton numbers
neutron numbers
Correct answer is B
neutrons + protons = the nucleus or mass numbers.
U-238 has mass number(proton 92 + neutron 146=238)
U-235 has mass number (proton 92 + neutron 143 =235)
An ammeter connected to an a.c circuit records 5.5. The peak current in the circuit is
7.8A
7.1A
3.8A
3.5A
Correct answer is A
\(I_o = I_{rms} \times \sqrt{2} = 5.5 \times 1.41 = 7.8A\)
112.5Hz
225.0Hz
323.5Hz
707.1Hz
Correct answer is A
fo = \(\frac{1}{2 \pi \sqrt{LC}} = \frac{1}{2 \times 3.14 \sqrt{1 \times 2 \times 10^{-6}}}\)
= 112.5Hz