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.
0.5kJ
8.0kJ
20.0kJ
40.0kJ
Correct answer is D
Heat energy = Elect. energy
heat energy= I2RT
= 2 X 2 X 50 X 200
= 40000J
to convert to kJ, divide J by 1000
hence, \(\frac{40000}{1000}\) = 40kJ
The purpose of a dielectric material in a parallel plate capacitor is to
increase its capacitance
decrease its capacitance
insulate the plate from each other
increase the magnetic field between the plates
Correct answer is C
No explanation has been provided for this answer.
16.0A
8.0A
0.8A
0.4A
Correct answer is B
I = \(\frac{E.m.f}{R + r}\)
= \(\frac{12}{1 + 0.5}\)
I = 8A
1 : 6
1 : 3
2 : 1
6 : 1
Correct answer is D
\(\frac{V_1}{V_2}\) = \(\frac{I_1R_1}{I_2R_2}\)
\(\frac{I_1}{I_2}\)V2 = 3V1 and R1 = 2R2
\(\frac{V_1}{3V_1}\) = \(\frac{I_1 \times\ 2R_2}{I_2\times R_2}\)
\(\frac{I_1}{I_2}\) = \(\frac{6}{1}\)
At different locations on the earth's surface, the earth's magnetic field is
the same in magnitude and direction
the same in magnitude but different in direction
different in both magnitude and direction
different in magnitude but different in direction
Correct answer is A
No explanation has been provided for this answer.