Category: Past Papers MCQs

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1.	Biology mcqs	2.	Chemistry mcqs
3.	General Knowledge mcqs	4.	Pak Studies
5.	Physics mcqs

A heavy uniform chain lies on horizontal table top. If the coefficient of friction between the chain and the table surface is 0.25, then the maximum fraction of the length of the chain that can hang over the edge of the table is__________

20%
25%
30%
35%

26 If a step up transformer have turn ratio 5, frequency 50 Hz root mean square value of potential difference on primary 100 volts and the resistance of the secondary winding is 500 W then the peak value of voltage in secondary winding will be (the efficiency of the transformer is hundred percent.

500 √2
10 √2
50 √2
20 √2

Which of the following is intensive property of a thermodynamic system ?

P and T
V and T
V and P
V and E

For which logic gate the following statement is true ? The output is high, if and only if all inputs are high________

AND
OR
NAND
NOR

The conversion of a moving coil galvanometer into a voltmeter is done by

introducing a resistance of large value in series.
introducing a resistance of small value in parallel.
introducing a resistance of large value in parallel.
introducing a resistance of small value in series.

Monochromatic radiation emitted when electron on hydrogen atom jumps from first excited to the grounds state irradiates a photosensitive material.The stopping potential is measured to be 57V.The threshold frequency of the material is_____

1.6 × 10¹⁵ Hz
2.5 × 10¹⁵ Hz
4 × 10¹⁵ Hz
5 × 10¹⁵ Hz

A man throws balls with the same speed vertically upwards one after the other at an interval of 2 seconds. What should be the speed of the throw so that more than two balls are in the sky at any time ?(Given g = 8 m/s².

More than 19.6 m/s.
At least 9.8 m/s.
Any speed less than 19.6 m/s.
Only with speed 19.6 m/s.

A bomb of mass 30kg at rest explodes into two pieces of masses 18kg and 12kg. The velocity of 18kg mass is 6ms–1 . The kinetic energy of the other mass is______

324 J
486 J
256 J
524 J

A thin prism having refracting angle 10° is made of glass of refractive index This prism is combined with another thin prism of glass of refractive index This combination produces dispersion without deviation. The refracting angle of second prism should be _________

6°
8°
10°
4°

The area of hysteresis loop of a material is equivalent to 250 Joule/m When 10 kg material is magnetised by an alternating field of 50Hz then energy lost in one hour will be if the density of material is 5 gm/cm³.

6 × 10⁴ Joule
6 × 10⁴ Erg
3 × 10² Joule
3 × 10² Erg

If the oscillations are highly damped, the amplitude of oscillations__________

decrease with time
increase with time
remains constant with time
first increase and then decreases

A satellite is orbiting around the earth at a mean radius of 16 times that of the geostationary orbit. What is the period of the satellite?

64 days
32 days
16 days
8 days

A ladder rests against a frictionless vertical wall, with its upper end 6m above the ground and the lower end 4m away from the wall. The weight of the ladder is 500 N and its centre of gravity at (1/rd distance from the lower en Wall’s reaction will be, in N________

111
333
222
129

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