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.
Which of the following materials does not serve as a safety device in electrical circuits?
Connecting wires
Earth wire
Fuse
Switch
Correct answer is A
No explanation has been provided for this answer.
In the diagram above, the time taken to trace a wave between P and Q is?
2 periods
1 period
1\(\frac{1}{2}\) periods
1\(\frac{1}{4}\) periods
Correct answer is A
frequency means no of oscillation per secs, so the time taken to trace a wave between p and q is 2secs.
Which of the following thermometers is used to measure the temperature of the human body?
Thermocouple
Alcohol-in-glass thermometer
Gas thermometer
Platinum resistance thermometer
Correct answer is B
The range of usefulness of the thermometer is set by the boiling point of the liquid used. In the case of the ethanol-filled thermometer, the upper limit for measurement is 78 °C (172.4 °F), which makes it useful for measuring daytime, nighttime and body temperatures, although not for anything much hotter than these.
Z
X
Y
W
Correct answer is A
for an object moving along a circular path, it speed is constant but its linear velocity changes with time at every point on the circle
1.6 x 10\(^{-9}\)N
1.3 x 10\(^{3}\)N
2.3 x 10\(^{3}\)N
5.0x 10\(^{3}\)N
Correct answer is A
Using the formula
F = \(\frac{Gm_1m_2}{r^2}\)
= \(\frac{6.67 \times 10^{-11} \times 3.0 \times 2.0}{(50)^2}\)
= \(\frac{40.02 \times 10^{-11}}{2500}\)
= 1.6 x 10\(^{-9}\)N