Physics Mcqs – (Science) MCQs Latest For FPSC, PPSC, NTS, KPPSC, SPSC & Other Tests
“ Physics Mcqs “. Tab this page to check “Latest Physics MCQs” for the preparation of competitive mcqs, FPSC mcqs, PPSC mcqs, SPSC mcqs, KPPSC mcqs, AJKPSC mcqs, BPSC mcqs, NTS mcqs, PTS mcqs, OTS mcqs, Atomic Energy mcqs, Pak Army mcqs, Pak Navy mcqs, CTS mcqs, ETEA mcqs and others. The most occurred mcqs of Physics in past papers. Past papers of Physics mcqs. Past papers of Physics MCQs. Physics Mcqs are the necessary part of any competitive / job related exams. The Physics mcqs having specific numbers in any written test. It is therefore everyone have to learn / remember the related Physics mcqs. The Important series of Physics Mcqs are given below:
An immersion heater of 400 watts kept on for 5 hours will consume electrical power of __________________?
Resistance of an ideal insulator is __________________?
D. depends upon nature
Reciprocal of resistivity is called__________________?
Circuit which gives continuously varying potential is called _______________________?
A. wheat stone bridge
B. complex network
C. potential divider
D. all of above
There are three bulbs of 60W 100W and 200W which bulb has thickest filament ?
Specific resistance of a wire____________________?
A. will depend on its radius
B. will depend on its length
C. will depend on the type of material of the wire
D. will depend on none of the above
In the following figure, the terminal potential is ___________________ ?
Which one of the following materials is useful for making bulb filaments ?
If 1 ampere current flows through 2m long conductor the charge flow through it in 1 hour will be_______________?
Why should a resistance be introduced in a circuit in series deliberately ?
A. to control current
B. to decrease current
C. to increase current
D. just to give a good look to circuit
All electrical appliances are connected in parallel to each other between the main line and neutral wire to get ______________________?
A. same current and potential difference
B. same current
C. different current but same potential difference
D. different current and potential differences
Resistance of a conductor depends upon_________________?
A. dimension of conductor
B. nature of conductor
C. physical state of the conductor
D. all of above
A wire of uniform area of cross-section A length L and resistance R is cut into two parts. Resistivity of each part _________________?
A. remains the same
B. is halved
C. is doubled
D. becomes zero
When same current passes for same time through a thick and thin wire_________________?
A. no heat is produced in wire
B. more heat is produced in thin wire
C. more heat is produced in thick wire
D. less heat is produced in thick wire
One kilowatt hour is the amount of energy delivered during _______________?
A. one day
B. one second
C. one minute
D. one hour
How much heat does a 40 W bulb generates in one hour ?
Resistance of a super conductor is ______________________?
D. changes with every conductor
Which one is the best material for making connecting wires ?
Internal resistance is the resistance offered by________________?
A. source of EMF
Three bulbs are rating 40W 60W and 100W designed to work on 220V mains. Which bulb will burn most brightly if they are connected in series across 220 V mains ?
A. 40 W bulb
B. 100 W bulb
C. 60 W bulb
D. all will burn equally brightly
Resistance of a wire on increasing its temperature will_________________?
A. increase with rise in temperature
B. will remain same
C. decrease with rise in temperature
D. depends upon altitude of experimentation
An electric iron is marked 20 volts 500W. The units consumed by it in using if for 24 hours will be______________?
In liquids and gases the current is due to the motion________________?
A. positive charges
B. negative charges
C. both negative and positive charges
D. neutral particles
The graphical representation of Ohms law is___________________?
D. straight line
The resistance of a conductor at absolute zero (OK) is________________?
A. zero almost
B. no prediction at all
C. infinite almost
D. may increase or decrease
Electrical energy is measured in___________________?
A. horse power
C. kilo watt
D. kilowatt hour
Electrical energy is converted to heat at the rate of___________________?
A fuse is placed in series with the circuit to protect against__________________?
A. high voltage
B. high power
C. high current
D. over heating
Which one of the following bulbs has the least resistance ?
A. 200 watt
B. 100 watt
C. 300 watt
D. 60 watt
Optical active crystals rotates the __________________?
A. diffraction plane
B. polarization plane
C. vibrating plane
D. interference plane
In double slit experiment we observe _____________________?
A. diffraction fringes only
B. interference fringes only
C. both interference and diffraction fringes
D. polirized frringes
Which one of the following properties of light does not change with the nature of the medium ?
Photoelectric effect was given by ____________________?
Longitudinal waves do not exhibit _____________________?
A point source of light placed in a homogeneous medium gives rise to ___________________?
A. an elliptical wave front
B. a cylindrical wave front
C. a spherical wave front
D. a plane wave front
Which one of the following is nearly monochromatic light ?
A. light form neon lamp
B. light form fluorescent tube
C. light form sodium lamp
D. light form simple lamp
When crest of one wave falls over the trough of the other wave this phenomenon is known as________________?
A. constructive interference
C. destructive interference
In Young double slit experiment, if white light is used____________________?
A. no interference fringes will be seen
B. coloured fringes will be seen
C. alternate dark and bright fringes will be seen
D. impossible to predict
In an interference pattern______________________?
A. dark fringes are wider than bright fringe
B. bright fringes are wider than dark fringes
C. both dark and bright fringes are of equal width
D. central fringes are brighter than the outer fringes
The blue colour of the sky is due to___________________?
When one mirror of a Michelson Interferometer is moved a distance of 0.5 mm we observe 2000 fringes. What will be wavelength of light used ?
C. 5000 nm
Wavelength of X-rays falling at glancing angle of 30? on a crystal with atmic spacing 2 x 10-10 for the fist order diffraction is________________?
B. 2 x 10-10 m
C. 4 x 10-10 m
In a plane polarized light _________________?
A. vibration in two mutually perpendicular directions
B. vibration in all direction
C. vibration take place in a direction perpendicular to the direction of propagation of light
D. no vibration at all
Which one of the following cannot be polarized ?
A. ultraviolot rays
B. radio waves
D. sound waves
In monochromatic red light a blue book will probably appear to be_________________?
D. no scientific reasoning available
In double slit experiment if one of the two slit is covered then________________?
A. no interference fringes are observed
B. no fringes observed
C. no diffraction fringes are observed
D. interference pattern not disturbed
In the shadow of a ball the central portion appears bright that happens due to_________________?
Crystals of a material can behave as_________________?
B. Convex lens
C. Diffraction grating
Which is not optically active ?
A. tartaric acid
D. sodium chlorate
When light incident normally on thin film the path difference depends upon ________________?
A. nature of the film only
B. thickness of the film only
C. angle of indidence only
D. all thickness nature and angle of incidence
Light reaches the earth form sun in nearly____________________?
A. 10 minutes
B. 15 minutes
C. 8 minutes
D. 8 minutes 30 seconds
According to Einstein light travels form one place to another in the form of ________________?
D. it was not his discovery
Central spot of Newtons rings __________________?
C. dark for large wavelength
D. bright for large wavelength
The locus of all points in a medium having the same phase of vibration is called____________________?
D. wave front
Two sources of light are coherent if they emit rays of_______________?
A. same amplitude of vibration
B. same wavelength
C. same wave length with constant phase difference
D. same amplitude and wavelength
The velocity of light was determined accurately by_______________?
appearance of colour in thin films is due to ____________________?
A light ray traveling form rarer to denser medium suffers a phase change of__________________?
Diffraction effect is____________________?
A. less for a round edge
B. more for a round edge
C. more for a sharp edge
D. less for a sharp edge
A diffraction grating has 500 lines per mm. Its slit spacing or grating element will be equal to ____________________?
A. 5 x 10-3 mm
B. 500 mm
C. 2 x 10-5 mm
D. 2 x 10-3 mm
Light on passing through a Polaroid is ___________________?
A. plane polarized
B. circularly polarized
D. elliptically polarized
Diffraction fringes are____________________?
A. distance between them increases
B. equally spaced
C. distance between then decreases
D. they are adjacent with no space in between
A thing that emits its own light is___________________?
Gives the definition of metre in terms of wavelength of red cadmium light ___________________?
Which experiment shows that wavelength of light is smaller than that of sound___________________?
When a force is parallel to the direction of motion of the body, then work done on the body is_____________________?
If a body a mass of 2 kg is raised vertically through 2m, then the work done will be _________________?
A. 392.1 J
B. 38.2 J
C. 39.2 J
D. 3.92 J
The average power and instantaneous power become equal if work is done at __________________?
A. at variable rate
B. any rate
C. at uniform rate
D. at high rate
Proton electron neutron and a particles have same momentum. Which of them have highest K.E ?
Work done by variable force is determine by dividing____________________?
A. both force and displacement into small intervals
B. displacement into small interval
C. force into small interval
D. force into small and displacement into large intervals
The escape velocity of a body in gravitational field of earth is independent of__________________?
A. the angle at which it is thrown
B. its mass
C. both its mass and the angle at which it is thrown
D. gravitational field of earth
The source of geothermal energy is___________________?
A. compression of material in the earth
B. decay of radioactive element in the earth
C. residual lost of the earth
D. all as said in A – B and C
Work done by the force of friction is____________________?
A. positive only for small frictional force
B. always negative
C. always positive
D. positive only for large frictional force
If velocity is doubled then__________________?
A. momentum and K.E. remain same
B. momentum increases 4 times and K.E increases 2 times
C. momentum increases 2 times and K.E increases constant
D. momentum increases 2 times and K.E increases 4 time
Which of the following is not conservative force_________________?
The consumption of energy by a 60 watt bulb in 2 sec is_________________?
A. 120 J
B. 30 J
C. 60 J
D. 0.02 J
The escape velocity form the earth surface in km S-1 is____________________?
A. 7.5 km S-1
B. 4.2 km S-1
C. 9.5 km S-1
D. 1.1 km S-1
If moon radius is 1600 km and g on its surface is 1.6 ms-2 then the escape velocity on the moon is ___________________?
A. 71.6 ms-1
B. 50.6 ms-1
C. 1600 ms-1
When arrow is released form its bow, its energy is transformed from _____________________?
A. K.E to elastic P.E.
B. elastic P.E to K.E
C. elemical energy to elastic P.E
D. heat energy to K.E
The work done by friction is__________________?
D. none of these
The dimension of power is_______________?
D. none of these
The dot product of force and velocity is__________________?
The source of tidal energy is____________________?
C. both A and B
On a clear day at noon the solar energy reaching the earth is ____________________?
C. 1 kw/m2
Work done will be maximum if the angle between the force F and displacement d is______________________?
A field in which the work done in a moving a body along closed path is zero is called________________?
A. electromagnetic field
B. conservative field
C. electric field
D. gravitational field
Which of the following types of force can do no work on the particle on which it acts ?
A. gravitational force
B. frictional force
C. elastic force
D. centripetal force
An elevator weighing 3.5 x 10-6 N is raised to a height of 1000 m in the absence of friction, the work done is_________________?
A. 3.5 x 104 J
B. 3.5 x 103 J
C. 3.5 x 106 J
D. 3.5 x 109 J
The relation between horse power and watt is_________________?
A. 1 hp = 1000 watts
B. 1 hp = 746 watts
C. 1 hp = 546 watts
D. 1 hp = 946 watts
Slope of work time graph is equal to____________________?
Work done on the body equals to the _____________________?
A. change in its P.E always
B. change in its K.E always
C. change in its K.E and change in its P.E
D. neither change in K.E and nor change in its P.E
The tides raise the mater in the see roughly in a day___________________?
A. four time
D. eight time
The highest value of escape velocity in solar system is planet____________________?
Gravitational P.E of a body has____________________?
A. a formula
B. a formula mgh only
C. no formula
D. no general formula
When the speed of a moving body is doubled then___________________?
A. its P.E is doubled
B. its acceleration is doubled
C. its K.E is doubled
D. its momentum is doubled
One mega watt hour is equal to_________________?
A. 36 x 1012 J
B. 36 x 106 J
C. 36 x 109 J
D. 36 x 108 J
Work has the dimension as that of same as that of__________________?
B. linear momentum
C. angular momentum
The relation between the escape velocity V esc and orbital speed Vo is given by________________?
A. V esc = Vo
B. V esc = -2 Vo
C. V esc = 1/2Vo
D. V esc = 2Vo
When two protons are brought together_____________________?
A. P.E. between them decreases
B. P.E. between them increases
C. Kinetic energy increases
D. P.E. between them does not change
A man lifts vertically a weight of 40kg through 1m in 10s; while a chile lifts vertically a weight of 10kg through a distance of 1m in 1s. What will be correct inference ?
A. it is a foolish question
B. child does more work than man
C. both do the same amount of work
D. man does more work than child