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.
2 x 10\(^{-4}\)
2 x 10\(^{-3}\)
2 x 10\(^{-1}\)
2 x 10\(^2\)
Correct answer is B
Work done by friction = Friction force x displacement from the relation, f = μR
where μ = coefficient of friction ; R = normal reaction
=> F = μ mg (R = mg)
= 0.1 x 0.01 x 10
∴ work done = F x displacement
= 0.1 x 0.01 x 10 x 0.2
= 0.002
= 2 x 10\(^{-3}\)
Which of the following statements is true of the properties of a moving coil galvanometer?
THe coil has a small area
There are strong hair springs to gives a large control panlel
There is a strong permanent magnet to give high magnetic flux
it has a small number of turns of coil
Correct answer is C
The galvanometer possesses a rectangular coil mounted on a soft iron core rotating on a magnetic field induced by a permanent magnet.
2g
6g
10g
18g
Correct answer is A
From Faradays Law, mass deposited during electrolysis is given by
M = ItZ
=> Z = M/(It)
| = | __2 |
| 0.5x3x60x60 |
At what frequency would a capacitor of 2.5μF
used in radio circuit have a resistance of 250Ω
π/800 Hz
800/π Hz
200π Hz
2000π Hz
Correct answer is B
| Capacitive Reactance = | ___1 |
| 2π + C |
| => 250 = | ____1 |
| 2 x π x f x 2.5 x 106 |
| => F = | ___106 |
| 250 x 5.0 x π |
| = | 106 |
| 1250π |
The carbon-granules microphone works on the principle of change in
inductance
resistance
capacitance
voltage
Correct answer is B
No explanation has been provided for this answer.