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.
3.0 x 10-4J
3.0 x 10-1J
9.0 x 104J
9.0 x 1010J
Correct answer is D
Energy = mc2
= 1 x (3 x 108)2 x 106
= 9 x 1010J
6.5 x 10-2kg
2.6 x 10-2kg
6.5 x 10-3kg
2.6 x 10-3kg
Correct answer is D
m = QZ
= 2 x 104 x 1.3 x 10-7
= 2.6 x 10-3kg
0.625A
1.600A
2.500A
6.250A
Correct answer is A
Efficiency = \(\frac{I_sV_s}{I_pV_p}\) x 100
3.6 x 103J
5.0 x 103J
3.0 x 105J
1.8 x 107J
Correct answer is D
Elect. energy = I2Rt
= 100 x 100 x 0.5 x 3600
= 1.8 x 107J
The iron core of an induction coil is made from bundles of wire so as to
minimize eddy-currents
generate eddy-current
prevent sparking at the contact breaker
get the greatest posible secondary voltage
Correct answer is A
No explanation has been provided for this answer.