Multiple Choice Questions | Chapter 13 Electromagnetism l 2nd Year Physics Federal Board | KPK

Описание: Each of the following questions is followed by four answers. Select the correct answer in each case.
A current is flowing North in a magnetic field that points West. It experiences
A. a force down B. a force up C. a force west D. no force
Two long, straight wires have currents flowing in them in the same direction, the force between the wires is
A. attractive B. repulsive C. zero D. infinite
One weber is equal to
A. N.A^2/m B. N.m^2/A C. N.A^ /m D. N.m^ /A
The magnetic flux will be maximum if the angle between magnetic field
A. 0 B. 45 C. 60 D. 90
Ampere’s law is applied over any
A. surface B. closed surface C. path D. closed path
When the number of turns in a solenoid is doubled without any change in the length of the solenoid its self induction will be
A. Four times B. Doubled C. Halved D. One forth
If the charge is at rest in magnetic field, then force on charge is
A. qvB B. qvB cosθ C. qvB sinθ D. zero
Work done on a charge particle moving in a uniform magnetic field is
A. maximum B. minimum C. zero D. infinite
The Earths northern magnetic pole acts like:
A. The north pole of a magnet B. The south pole of a magnet
C. It has a positive charge D. It has a negative charge
The pole pieces of the magnet in galvanometer are made concave to make the field
A. Radial B. Stronger C. Weaker D. Both A & B
When a small resistance is connected parallel to galvanometer, the resulting circuit behaves as
A. Voltmeter B. Ammeter C. Velocity Selector D. AVO meter
To measure the voltage the voltmeter is connected with the circuit in
A. series B. parallel C. perpendicular D. straight line
The resistance of ideal voltmeter is
A. small B. large C. zero D. infinite
The torque in the coil can be increased by increasing
A. Number of turns B. Current and magnetic field C. Area of coil D. All of these