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.
One of the features of the fission process is that
its products are not radioactive
it leads to chain reaction
neutrons are not released
the sum of the masses of the reactants equals the sum of masses of the products
Correct answer is B
No explanation has been provided for this answer.
In a purely inductive circuit, the current
lags behind the voltage in phase by 90o
leads the voltage in phase by 90o
is in the same phase with the voltage
leads the voltage by 180o
Correct answer is A
No explanation has been provided for this answer.
50.0Hz
100.0Hz
311.0Hz
314.2Hz
Correct answer is A
V = 311 sin314.2t compare with,
V = V sin2\(\pi\)Ft
2\(\mu\)F = 314.2
F = \(\frac{314.2}{2 \times\ 3.142}\)
F = 50Hz
25W
50W
120W
125W
Correct answer is A
P = IVcos\(\theta\)
= 5 x 10 x cos60
= 25W
What is the total electrical energy consumed by using an electric cooker rated 1000W for 5 hrs?
5.3 x 103J
6.5 X 103J
1.8 X 107J
2.3 X 107J
Correct answer is C
Energy = power x time
= 1000 x 5 x 3600
= 1.8 X 107J