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.
67cm
73cm
949cm
952cm
955cm
Correct answer is E
Atmospheric pressure = 70cmHg (which is the height of mecury)
pressure = pgh = pwghw
Where
Pw = density of water
hw = height of water
ph = pwhw
13.6*70 = 1*hw
hw = 952cm
Pressure of gas in cm of water = 952 + 3 = 955cm
27km, 1218hr
29km, 1315hr
40km, 1418hr
53km, 1436hr
60km, 1500hr
Correct answer is B
No explanation has been provided for this answer.
slope of line PQ
Reciprocal of either OP or OQ
Length OP or OQ
area under the graph E ratio OP/OQ
Correct answer is B
The intercept on either of the axes of the graph of \(\frac{1}{u}\) against \(\frac{1}{v}\) gives the value of \(\frac{1}{f}\). Hence, the reciprocal of this intercecpt gives the value of the focal length.
The wave motion above has a frequency
0.1Hz
0.2Hz
5Hz
10Hz
100Hz
Correct answer is C
No explanation has been provided for this answer.
The effect of closing the key K in the circuit shown above would be to
increase the current by 0.6A
reduce the current by 0.6A
increase the current by 0.4A
keep the current unchanged
Correct answer is C
When K is open, the total resistance
R = 8\(\Omega\) + 2\(\Omega\) = 10\(\Omega\)
I = \(\frac{V}{R}\) = \(\frac{6}{10}\)
= 0.6A
When K is closed, we have
\(\frac{1}{R}\) = \(\frac{1}{8}\) + \(\frac{1}{8}\)
⇒ \(\frac{1}{R}\) = \(\frac{1}{4}\)
⇒ R = 4\(\Omega\)
The total resistance R = 4\(\Omega\) + 2\(\Omega\)
= 6\(\Omega\)
I = \(\frac{6}{6}\)
= 1A
Hence, I = 1A - 0.6A = 0.4A increase