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.
The Earth's magnetic equator passes through Jos in Nigeria. At Jos. the
angle of variation is zero
magnetic declination is 90o
angle of dip is zero
horizontal component of the Earth's magnetic field is zero
Correct answer is C
No explanation has been provided for this answer.
296.7\(\Omega\)
400.0\(\Omega\)
512.2\(\Omega\)
806.7\(\Omega\)
Correct answer is D
P = \(\frac{v^2}{P} = \frac{220^2}{100} = 806.7\Omega\)
7.5A
2.5A
1.2A
0.8A
Correct answer is C
P = IV
I = \(\frac{P}{V} = \frac{3 \times 100}{250} = 1.2A\)
What is the total energy stored by the capacitors?
2.0 x 10-4J
1.0 x 10-4J
9.0 x 10-2J
1.0 x 10-2J
Correct answer is D
Energy = \(\frac{1}{2}CV^2 = \frac{1}{2} \times 2 \times 10^{-6} \times 100^2\)
= 1.0 x 10-2J
What is the effective capacitance in the circuit?
2\(\mu F\)
6\(\mu F\)
18\(\mu F\)
216\(\mu F\)
Correct answer is A
\(\frac{1}{c} = \frac{1}{6} + \frac{1}{6} + \frac{1}{6}\)
= \(\frac{1 + 1 + 1}{6} = \frac{3}{6} = \frac{1}{2}\)
= 2\(\mu F\)