HSSC-II (Class-12) Solved Physics MCQs; Unit-13: Electromagnetism; (New Book/KPK Text Board, Peshawar) With Verified Answers

1. 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.

... Answer is B. a force up.
--------------------------

2. 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

... Answer is A. attractive.
----------------------

3. One weber is equal to

A. N A²/m
B. N m²/A
C. N A/m
D. N m/A

... Answer is D. N m/A
---------------------------

4. Magnetic flux will be maximum if the angle between magnetic field strength and vector area is

A. 0°
B. 45°
C. 60°
D. 90°

... Answer is A. 0°
--------------------------------

5. Ampere's law is applied to any 

A. surface
B. closed surface
C. path
D. closed path

... Answer is D. closed path
------------------------

6. 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

... Answer is A. Four times
------------------------------

7. If the charge is at rest in a magnetic field, then the force on the charge is :

A. qvB
B. qvB cos θ
C. qvB sin θ
D. zero

... Answer is D. zero
--------------------------

8. Work done on a charged particle moving in a uniform magnetic field is

A. maximum
B. minimum
C. zero
D. infinite

... Answer is C. zero
-------------------------

9. The Earth's northern magnetic pole acts like this:

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

... Answer is B. the south pole of a magnet
------------------------

10. The pole pieces of the magnet in the galvanometer are made concave to make the field

A. Radial
B. Stronger
C. Weaker
D. Both A and B

... Answer is D. Both A and B
----------------------

11. When a small resistance is connected parallel to a galvanometer, the resulting circuit behaves as

A. Voltmeter
B. Ammeter
C. Velocity Selector
D. AVO meter

... Answer is B. Ammeter
------------------------------

12. To measure the voltage the voltmeter is connected to the circuit in

A. Series
B. Parallel
C. Perpendicular
D. Straight Line

... Answer is B. parallel
-------------------------

13. The resistance of the ideal voltmeter is

A. Small
B. Large
C. Zero
D. Infinite

... Answer is D. Infinite
-------------------------

14.  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

... Answer is D. All of these
----------------------------

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