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.
150V
55V
36V
15V
Correct answer is D
\(\frac{ES}{EP} = \frac{Ns}{Np} = \frac{Es}{150} = \frac{40}{400}\)
Es = \(\frac{150 \times 40}{400}\)
= 15V
0.0005\(\Omega\)cm
0.0015\(\Omega\)cm
0.0016\(\Omega\)cm
0.0700\(\Omega\)cm
Correct answer is A
e = \(\frac{RA}{L} = \frac{10 \times 0.005}{100} = 0.0005\)
1.8A
1.0A
0.8A
0.3A
Correct answer is B
\(\frac{1}{r} = \frac{1}{r_1} + \frac{1}{r_2}\)
= \(\frac{1}{5} + \frac{1}{20}\)
= \(\frac{4 + 1}{20} = \frac{5}{20}\)
r = \(\frac{20}{5}\)
= 4\(\Omega\)
R = R1 + R2
= 5 + 4
= 9\(\Omega\)
but V = IR
I = \(\frac{V}{R} = \frac{9}{9}\)
= 1A
21\(\mu C\)
3.6\(\mu C\)
4.0\(\mu C\)
4.4\(\mu C\)
Correct answer is A
F = \(\frac{Q^2}{4 \pi \varepsilon_o r^2}\)
I = 9 x 109 x \(\frac{Q^2}{0.2^2}\)
Q = \(\sqrt{\frac{0.04}{9 \times 10^9}}\)
= 2.11 x 10-6
16\(\Omega\)
68\(\Omega\)
106\(\Omega\)
212\(\Omega\)
Correct answer is D
\(X_c = \frac{1}{2 \pi fc}\)
= 2 x 3.142 x 50 x 15 x 10-6
= 212.179\(\Omega\)