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
1.5
1.32
1
0.67
Correct answer is E
\(\alpha_1\)L1 = \(\alpha_2\)L2
\(\frac{L_1}{L_2}\) = \(\frac{\alpha_1}{1.5\alpha_2}\) (since a1- 1.5\(\alpha_2\))
\(\frac{L_1}{L_2}\) = 0.67
20g
25g
45g
50g
100g
Correct answer is A
Heat lost = heat gained
mc\(\theta\) = c\(\theta\) + mc\(\theta\)
m x 4.18 x (100 - 50) = 80(50 -25) + [20 x 4.18] x (50 - 25)
m = 20g
Which of the following elements is the best absorber of X-rays?
hydrogen
oxygen
calcium
copper
lead
Correct answer is E
No explanation has been provided for this answer.
Which of the following radiations cannot be deflected by a magnetic field?
\(\alpha\)
\(\beta\)
\(\gamma\)
\(\beta\) and \(\gamma\)
none of them
Correct answer is C
No explanation has been provided for this answer.
The best material for the core of the primary and secondary coils of an induction coil is
copper, because it has a good conductor of electricity
steel, because it becomes magnetic and retains its magnetism for a long time
rubber, because it is a good insulator and the user is prevented from shock
soft iron, because it becomes magnetic but easily loses its magnetism
glass, because it is transparent
Correct answer is D
No explanation has been provided for this answer.