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.
Control in nuclear reactors is effected with boron rods because rhe rods have the ability to
absorb electrons
absorb neutron
accelerate electrons
slow down neutrons
Correct answer is B
No explanation has been provided for this answer.
Nuclear fission is preffered to nuclear fusion in the generation of energy because
very high temperature are required for fusion
the raw materials for fusion are easily obtained
energy obtained from fusion is relatively small
the by-products of fusion is very dangerous
Correct answer is C
No explanation has been provided for this answer.
When a radioactive substance undergoes a beta decay, its
mass number decreases by 1
atomic number decreases by 1
mass number increases by 1
atomic number increases by 1
Correct answer is D
No explanation has been provided for this answer.
i only
ii only
iii only
i and iii only
Correct answer is C
No explanation has been provided for this answer.
A direct current of 5A flow through a 0.2H inductor. Calculate the energy stored in the inductor
0.5J
1.0J
2.5J
5.0J
Correct answer is C
P = \(\frac{1}{2} I^2 L\)
= 5\(^2 \times\) 0.2 \(\times\) \(\frac{1}{2}\)
= 2.5J