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.
100\(^o\)C
248\(^o\)C
250\(^o\)C
350\(^o\)C
Correct answer is C
t\(_\theta\) - t\(_o\) = 10,
t\(_{100}\) - t\(_o\) = 4
| θ | = | t\(_\theta\) - t\(_o\)
t\(_{100}\) - t\(_o\) |
× | 100 |
| 10
4 |
× | 100 | = | 250°C |
5Hz
6Hz
5.2Hz
25Hz
Correct answer is A
\(V = \frac{Distance}{time}\)
= \(\frac{50cm}{2s}\)
= 25 cms\(^{-1}\).
\(V = f \lambda\)
\(f = \frac{V}{\lambda}\)
\(f = \frac{25}{5}\)
= 5 Hz
A supply of 400V is connected across capacitors of 3μf and 6μf in series. Calculate the charge
8 x 10\(^{-4}\)C
4 x 10\(^{-2}\)C
8 x 10\(^{-3}\)C
4 x 10\(^{-8}\)C
Correct answer is A
| C\(_T\) | = | C\(_1\) × C\(_2\)
C\(_1\) + C\(_2\) |
| = | 3 × 6
3 + 6 |
= \(\frac{18}{9}\) = 2μf
Q = CV
⇒ 2 × 10\(^{-6}\) × 400
⇒ 800 × 10\(^{-6}\)C = 8 × 10\(^{-4}\)C
At J, the wire becomes plastic
J is the yield point
L is the elastic limit
At K, the wire breaks
Correct answer is B
- I is the elastic limit
- the end of the constant part J is the yield point
- L is the break point.
Aluminium is sometimes used as the leaf of an electroscope because it
is a light material
is a good conductor
is a good insulator
can be converted into thin sheets
Correct answer is D
- Aluminium can be made in thin sheet like Gold.
- the leaf is a thin material that can be diverged easily.