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Category: Past Papers MCQs

No.	Topics.	No.	Topics.
1.	Biology mcqs	2.	Chemistry mcqs
3.	General Knowledge mcqs	4.	Pak Studies
5.	Physics mcqs

In an orbital motion, the angular momentum vector is__________

along the radius vector
parallel to the linear momentum
in the orbital plane
perpendicular to the orbital plane

In a bstance the energy gap between the conduction band and the valence band is 0.001 eV. The substance must be______

an insulator
a semiconductor
an alloy
a conductor

If sound waves of frequency 20 KHz are to be transmittedirectly, then the length of the antenna required is

15 km
3.75 km
20 km
7.5 km

Bernoulli’s equation for steady, non-viscous, in compressible flow expresses the_________

Conservation of angular momentum
Conservation of density
Conservation of momentum
Conservation of mechanical energy.

A dip circle is taken to geomagnetic equator. The needle is allowed to move in a vertical plane per-pendicular to the magnetic meridian. The needle will stay____________

in horizontal direction only
in vertical direction only
in any direction except vertical and horizontal
in any direction it is released

A body is projected vertically upwards from the surface of the earth. If it’s kinetic energy is equal to half of its minimum value required to escape from the gravitational influence, then the height up to which it rises is_____

4R
3R
2R
R

Which of the following can be used to produce a propagating electromagnetic wave?

Charge moving at a constant speed
Chargeless particle
Stationary charge
An accelerating charge

The value of a capacitor formed by thin metallic foil is 2 mF. The foil is attached to both sides of a paper having a thickness of 0.015 mm. The dielectric constant of the paper is 5 and its breadth is 40 mm. The length of the foil used is_________

0.34 m
1.33 m
13.4 mm
33.9 m.

Electromagnets are made of soft iron because soft iron has__________

High retentivity and low coercive force
Low retentivity and high coercive force
High retentivity and high coercive force
Low retentivity and low coercive force

A solid cylinder of mass 3 kg is rolling on a horizontal surface with velocity 4 m/s. It collides with a horizontal spring of force constant 200 N/m. The maximum compression produced in the spring will be_______

0.7 m
0.2 m
0.5 m
0.6 m

A cooler of 1500 W, 200 volts, and a fan of 500 W, 200 volts are to be used from a household supply. The rating of fuse to be used is__________

2.5 A
5.0 A
7.5 A
10:00 AM

Which of the following is correct for periodic electromagnetic induction_________

maximum flux, zero emf
zero flux, maximum emf
zero flux, zero emf
& both

Optical fibre communication is generally preferred over cable communication system because of_____

low transmission loss
high degree of security
their small size
all the above

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