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.
1.32 x \(10^{-6}\)m
2.98 x \(10^{-6}\)m
3.32 x \(10^{-6}\)m
6.82 x \(10^{-6}\)m
8.01 x \(10^{-6}\)m
Correct answer is A
\(E=\lambda v=\frac{hc}{\lambda}\Rightarrow\lambda=\frac{hc}{E}={6.6 \times10^{-34}\times3\times10^8}{1.5\times10^{-19}}\\=1.32\times10^{-6}\)
9 x \(10^{7}\)J
1.8 x \(10^{8}\)J
1.8 x \(10^{9}\)J
9 x \(10^{-10}\)J
3.6 x \(10^{11}\)J
Correct answer is B
E=\(mc^2 = 2\times10^{-6} \times10^{-3}\times(3\times10^{8})^2=1.8\times10^{8}\)
0.001A
0.011A
0.111A
1A
1.1A
Correct answer is C
m=zIt, \(I=\frac{m}{zt}= \frac{6.6\times10^{-4}}{3.3 \times10^{-7}\times 1800}=1.1111\\ \)error=1.1111-1.0=0.111A.
0.01Ω
0.02Ω
50Ω
100Ω
150Ω
Correct answer is D
\(X_c=\frac{1}{2\pi{fc}}\)=\(\frac{1}{2\times\pi\times\frac{200}{\pi}\times 25\times 10^{-6}}=\frac{10^6}{10^4}\)=100 Ω
8 x \(10^{6}\)
4 x \(10^{6}\)
3 x \(10^{-4}\)
2 x \(10^{-4}\)
5 x \(10^{-7}\)
Correct answer is B
\(E= \frac{F}{O}= \frac{40}{1\times10^{-5}}=4 \times10^{6}\)