Category: Past Papers MCQs

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

A 5 watt source emits monochromatic light of wavelength 5000 Å. When placed 0.5 m away, it liberates photoelectrons from a photosensitive metallic surface. When the source is moved to a distance of 0 m, the number of photo electrons liberated will :

be reduced by a factor of 2
be reduced by a factor of 4
be reduced by a factor of 8
be reduced by a factor of 16

Which wavelength of the Sun is used finally as electric energy ?

Radio waves
IR waves
Visible light
Microwaves

Two balloons are filled, one with pure He gas and the other by air, respectively. If the pressure and temperature of these balloons are same then the number of molecules per unit volume is _______

more in the He filled balloon
same in both balloons
more in air filled balloon
in the ratio of 1 : 4

The ratio of resolving powers of an optical microscope for two wavelengths λ1 = 4000 Å and λ2 = 6000 Å is_______

9 : 4
3:02
16 : 81
8:27

If the earth suddenly stops rotating, then the value g at the equator, will___

decrease
increase
remain the same
be zero

Carrier waves are generally_____

low frequency waves
high frequency waves
medium frequency waves
ultrasonic waves

An oscillator converts______

power into power
power into power
mechanical power into power
none of the above

A wooden cube just floats inside water when a 200 g mass is placed on it. When the mass is removed the cube is 2 cm above water level. The side of cube is____________

5 cm
10 cm
15 cm
20 cm

The addition of three masses 6 g, 32 g, and 238 g, addressed up to proper decimal places is________

13.158 g
13.2 g
13.16 g
13.15 g

A NOR gate gives_____

high output when both inputs are high
high output when both inputs are low
low output when both inputs are low
high output when one input is low and the other input is high.

A gas mixture contain one mole He gas and one mole O2 gas. Find the ratio of specific heat at constant pressure to that at constant volume of the gaseous mixture__________

2
1.5
2.5
4

If three amplifiers each with a gain of 5 are connected in series, then the overall amplification will be________

15
125
03-May
25

Two coherent sources of equal intensities produce a maximum of 100 units. If the amplitude of one of the sources is reduced by 20%, then the maximum intensity produced will be ___________

100
81
89
60

Top Contributors

Zabeehullah
14961 Points
Ukrashenye_hpen
0 Points

All Categories

Quantitative Reasoning (Maths)

No categories

Verbal Reasoning (English)

No categories

Past Papers

Practice Papers

No categories

We are working on different job tests and university entry exams. Soon you will be able to find specific results for your searches.

Site Pages.

Top Categories.

Site Links.

© 2023 www.mcqscareer.com

error: Content is protected !!