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.
The direction of the magnetic field at a point in the vicinity of a bar magnetic is
along the line joining the point to the neutral point
always away from the south pole of the magnet
opposite the direction of the resultant field at that point
always towards the north pole of the magnet
the direction towards which the north pole of a compass needle would point
Correct answer is E
No explanation has been provided for this answer.
0.0N
2.0 x 10-21N
1.3 x 10-17N
5.1 x 10-14N
2.3 x 1013N
Correct answer is C
F = Bqv = 5.0 x 10-5 x 1.6 x 10-19 x 106
= 1.3 x 10-17
Lenz's law of electromagnet states that
the induced charge is constant for a fixed change of force
a force is exerted on a current-carrying conductor in a magnetic field
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
the induced current in a conductor is in such a direction as to oppose the change producing it
e.m.f. is induced in a circuit whenever there is a change in the magnetic flux linked with the circuit
Correct answer is D
No explanation has been provided for this answer.
depression
declination
variation
elevation
dip
Correct answer is E
No explanation has been provided for this answer.
Calculate the resistance of the filament of lamp rated at 240V 60W
240\(\Omega\)
360\(\Omega\)
960\(\Omega\)
144\(\Omega\)
2880\(\Omega\)
Correct answer is C
P = \(\frac{V^2}{R} = \frac{240^2}{60} = 960\)