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.
7.7 x 10\(^{47}\) N
6.0 x 10\(^{-8}\)N
3.0 x 10\(^{-14}\)N
1.3 x 10\(^{-26}\)N
Correct answer is B
Centripetal force (Fr) = \(\frac{MV^2}{r}\)
i.e. Fr = \(\frac{Mv^2}{r}\)
= \(\frac{9.1 \times 10^{-31} \times 2.0 \times 10^6 \times 2.0 \times 10^6}{6.1 \times 10^{-11}}\) N
= (\(\frac{36.4 \times 10^{-19}}{6.1 \times 10^{-11}}\)) N
= 5.967 x 10\(^{-8}\) N
~ 6.0 x 10\(^{-8}\) N
3.28 x 10\(^{16}\) rad s\(^{-1}\)
8.55 x 10\(^{3}\) rad s\(^{-1}\)
9.11 x 10\(^{13}\) rad s\(^{-1}\)
5.22 x 10\(^{15}\) rad s\(^{-1}\)
Correct answer is A
Angular speed of the electron (W)
w = \(\frac{Velocity}{Radius} = \frac{V}{R}\)
= \(\frac{2.0 \times 10^6}{6.1 \times 10^{11}}\)
= 3.28 x 10\(^{16}\) rads\(^{-1}\)
Which of the following devices is used for storing electric charges?
Transformer
Ammeter
Potentiometer
Capacitor
Correct answer is D
No explanation has been provided for this answer.
50.cm
10.0 cm
28.6 cm
57.2 cm
Correct answer is A
Using wheatstone bridge principle;
\(\frac{2}{x} = \frac{2}{(100 - x)}\)
2(100 - x) = 2 x \(x\)
200 = 2\(x + 2x\)
200 = 4x
x = \(\frac{200}{4}\)
= 50cm
It is a diamagnetic material
It loses its magnetism readily
It is not easily magnetized
It retains its magnetism for a long time
Correct answer is B
No explanation has been provided for this answer.