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.
Q2/(4πεor2)
Q/(4πεor2)
Q/(4πεor)
Q2/(4πεor2)
Q/(4πεor) 2
Correct answer is B
No explanation has been provided for this answer.
Soft iron is used in making the armature of an electric bell because it
retains its magnetism for a longtime
Loses its magnetism readily
Produces permanent magnets
is not easily magnetised
decreases the magnetic effect of a direct current
Correct answer is B
No explanation has been provided for this answer.
1.85Ω
2.0Ω
2.4Ω
4.5Ω
5.0Ω
Correct answer is B
No explanation has been provided for this answer.
Lenz's law of electromagnetic induction states that
e.m.f. is induced in a circuit whenever there is a change in the magnetic flux linked with the circuit.
the induced current in a conductor is in such a direction as to oppose the change producing it
the magnitude of the induced e.m.f. in a circuit is proportional to the rate of change of the number of lines of force linking the circuit
a force is exerted on a current-carrying conductor in a magnetic Held
the induced charge is constant for a fixed change of flux.
Correct answer is B
No explanation has been provided for this answer.
5.0 x 107Ω-1cm-1
5.0 x 106Ω-1cm-1
2.0 x 106Ω-1cm-1
5.0 x 105Ω-1cm-1
2.0 x 106Ω-1cm-1
Correct answer is D
No explanation has been provided for this answer.