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.
20 years
10 years
2 years
24 years
Correct answer is A
No explanation has been provided for this answer.
30V
70V
50V
40V
Correct answer is D
No explanation has been provided for this answer.
100J
150J
50J
200J
Correct answer is C
From the law of conservation of linear momentum,
\(m_1 u_1 + m_2 u_2 = m_1 v_1 + m_2 v_2\)
Since the collision is inelastic, we have
\((0.05 \times 200) - (0.95 \times 0) = (0.05 + 0.95)V\)
\(10 = V\)
\(V = 10ms^{-1}\)
Hence the Kinetic energy = \(\frac{1}{2} (0.05 + 0.95) \times 10^2\)
= \(\frac{1}{2} \times 100\)
= 50J
16.03cm\(^3\)
15.09cm\(^3\)
16.00cm\(^3\)
15.03cm\(^3\)
Correct answer is B
Volume Expansivity \(\gamma\) = \(3\alpha\)
\(\gamma = 3 \times 2\times10^{-5}\)
\(\gamma = 6\times10^{-5}C^{-1}\)
\(V_{2} = V_{1}(1 + \gamma\theta)\)
\(V_{2} = 15( 1 + (6\times10^{-5}\times(100-0)))\)
\(V_{2} = 15(1.006)\)
= \(15.09cm^{3}\)
Which of the following has the lowest internal resistance when new?
Leclanche cell
Daniel cell
Torch battery
Accumulator
Correct answer is D
No explanation has been provided for this answer.