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3.	General Knowledge mcqs	4.	Pak Studies
5.	Physics mcqs

Velocity of a particle of mass 1 kg moving rectilinearly is given by v = 25 – 2t + t Find the average power of the force acting on the particle between time interval t = 0 to t = 1 sec.

49 W
24.5 W
–49 W
–24.5 W

Universal gravitational constant (G. is__________

the gravitational force of attraction between two bodies
the gravitational force of attraction between two bodies each of unit mass.
the gravitational force of attraction between two bodies separated by unit distance.
the gravitational force of attraction between two bodies each of unit mass, separated from each other by a unit distance.

The oscillations of a simple pendulum can be considered to be simple harmonic if__________

the length of the pendulum is small
effective acceleration due to gravity is small
Mass of the bob is small
amplitude of oscillation is small

If a sphere is rolling, the ratio of its rotational energy to the total kinetic energy is given by_____________

7 : 10
2 : 5
10 : 5
2 : 7

A stone is thrown upwards and it rises to a height of 200 m. The relative velocity of the stone with respect to the earth will be maximum at __________

Height of 100 m
Height of 150 m
Highest point
The ground

A person, with outstretched arms, is spinning on a rotating stool. He suddenly brings his arms down to his sides. Which of the following is true about system kinetic energy K and angular momentum L ?

Both K and L increase.
Both K and L remain unchange
K remains constant, L increases.
K increases but L remains constant

In LCR circuit, the voltage across the terminals of a resistance, inductance &capacitance are 40V, 30V & 60V, then the voltage across the main source will be –

130 volt
100 volt
70 volt
50 volt

In a closed cylinder there are 60 g Ne and 64 g O2 .If pressure of mixture of gases in cylinder is 30 bar then partial pressure of O2 in this cylinder will be _______

30 bar
20 bar
15 bar
12 bar

If a source is moving away from a stationary observer with half of velocity of soun The frequency observed will be :-

one-third
doubled
halved
two-third

A satellite is orbiting very close to the surface of the earth. Its periodic time depends only upon the_____

mass of the earth
the density of the earth
mass of the satellite
the radius of the earth

The focal length of a spherical mirror is_______

Maximum for red light
Maximum for blue light
Maximum for white light
Same for all lights

The r.m.s. speed of the molecules of a gas in a vessel is 200 m/s. If 25% of the gas leaks out of the vessel, at constant temperature, then the r.m.s. speed of the remaining molecules will be______

400 m/s
150 m/s
100 m/s
200 m/s

Photoelectric emission occurs only when the incident light has more than a certain minimum _________

Power
Wavelength
Intensity
Frequency

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