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:
Forward current through a semi conductor diode circuit is due to____________?
A. minority carriers
B. majority carriers
C. electron
D. holes
Which one of the following is not a donor impurity ?
A. phosphorus
B. antimony
C. aluminium
D. arsenic
In the transistor schematic symbol, the arrow______________?
A. is located on the emitter
B. is locate on the collector
C. is located on the base
D. points form north to south
In full wave rectification the output D.C. voltage across the load is obtained for_____________?
A. The negative half cycle of input A.C.
B. The positive half cycle of input A.C.
C. The complete cycle of input A.C.
D. All of the above.
In half-wave rectification the output D.C. voltages is obtained across the load for_______________?
A. The positive and negative half cycles
B. The positive half cycle of A.C.
C. The negative half cycle of A.C.
D. Either positive or negative half of A.C.
The device used for conversion of D.C. to A.C. is called______________?
A. A rectifier
B. Converter
C. Inverter
D. Oscillator
The specially designed semi-conductor diodes used as fast counters in electronic circuits are______________?
A. Photo voltaic cell
B. Photo diodes
C. The light emitting diodes
D. Solar cells.
The alternating voltage is an example of_______________?
A. Discrete waveform
B. An analogue waveform
C. A digital waveform
D. None at all
The operational amplifier is______________?
A. A high gain amplifier
B. A high resistance amplifier
C. A high-power amplifier
D. A low resistance amplifier
To obtain an n-type semiconductor germanium crystal it must be doped with foreign atoms whose valency is_____________?
A. 3
B. 2
C. 4
D. 5
The operation of a transistor requires______________?
A. That the base be heated
B. That the emitter be heated
C. That the collector be heated
D. None of the above
Non-inverting amplifier circuits have____________?
A. A very high input impedance
B. A low output impedance
C. A very low input impedance
D. None of the above
An OP-AMP comparator is a circuit that compares the signal voltage on one of its inputs with a ______________?
A. Non-inverting voltage at output
B. Reference voltage on the other
C. Output
D. Virtual input
The working of transistor as amplifier is similar to________________?
A. Step down transformer
B. Step up transformer
C. Three diodes in common
D. Triode vacuum tube
To obtain a p-type semi-conductor Si Crystal must be doped with foreign atoms whose valency is_____________?
A. 4
B. 3
C. 2
D. 5
In a half-wave rectifier the r.m.s. value of the A.C. component of the wave is________________?
A. Less than D.C. value
B. More than D.C. value
C. Equal to D.C. value
D. Zero
In forward bias the width of potential barrier_____________?
A. Remains same
B. Decreases
C. Increases
D. No effect
The electronic circuits which implement the various logic operations are called_____________?
A. Logic gates
B. Amplifier gain
C. Boolean algebra
D. Logic functions
Acceptor and donor impurities donate______________?
A. p-carriers only
B. n-carriers only
C. p-carriers and n-carriers respectively
D. n-carriers and p-carriers respectively
An OP-AMPs can amplify_______________?
A. A.C.
B. D.C.
C. Both A.C. & D.C.
D. None of the above
The rectangular voltage is an example of____________________?
A. Continuous wave form
B. An analogue waveform
C. Electronic waveform
D. A digital waveform
The specially designed semi-conductor diodes used as fast counters in electronic circuits are_______________?
A. Photo voltaic cell
B. Photo diodes
C. The light emitting diodes
D. Solar cells.
Dimension of pressure is__________________?
A. ML-1T-1
B. MLT
C. ML-1T-2
D. ML-2T-2
Temperature is a property which determines_________________?
A. Whether a body will feel hot or cold to touch
B. How much heat a body contains
C. In which direction heat will flow between two systems
D. How much total absolute energy a body has
The scales of temperature are based on two fixed points which are_________________?
A. The temperatures of water at 0? 100?C
B. The temperature of melting ice and boiling water at atmospheric pressure
C. The temperatures of frozen and boiling mercury
D. The temperatures of ice cold and boiling water
At constant temperature the graph between V and 1/P is_____________?
A. Parabola
B. Hyperbola
C. A curve of any shape
D. A straight lime
We can produce heat by________________?
A. Chemical processes
B. Frictional process
C. Electrical processes
D. All of the above
Physics Mcqs
Metabolism is the name of a process in which energy transformation takes place within______________?
A. Atmosphere
B. Human body
C. Heat engine
D. Laboratory
The pressure exerted by a column of mercury 76cm high and at 0°C is called_______________?
A. 1 atmosphere
B. 1 Pascal
C. 1 Newton per square meter
D. data is insufficient
If the pressure of a given gas is held constant its density is inversely proportional to its absolute temperature. We can refer it as another statement of______________?
A. Ideal gas law
B. Charles law
C. Boyles law
D. Avagadros law
Gas molecules of different masses in the same container have the same average transnational kinetic energy which is directly proportional to their_____________?
A. pressure
B. volume
C. absolute temperature
D. time
Boyles law helds for ideal gases in________________?
A. isobaric processes
B. isochoric processes
C. isothermal processes
D. adiabatic processes
If the volume of a gas is held constant and we increase its temperature then_______________?
A. its pressure falls
B. its pressure rises
C. its pressure is constant
D. any of above
Which one is not an example of adiabatic process ?
A. rapid expansion of air
B. rapid escape of air from a burst tyre
C. conversion of water into ice in refrigerator
D. cloud formation in the atmosphere
In a clinical thermometer the mercury in the capillary tube does not contract once removed from the patient because_______________?
A. The amount of mercury use is very small
B. Mercury takes a long time to contract
C. The capillary tube has a small constriction near the bulb
D. The capillary tube is very narrow
We prefer mercury as a thermometric substance because______________?
A. Over a wide range of temperature its expansion is uniform
B. It opaque to light
C. It does not stick to thermometer glass
D. All of above
Numerical value of Boltzmanns constant is______________?
A. 3.18×10-31JK-1
B. 1.38×10-31JK-1
C. 3.18×10-23JK-1
D. 1.38×10-23JK-1
Normal human body temperature 98.6°F corresponds to______________?
A. 37°C
B. 55°C
C. 42°C
D. 410°C
The Fahrenheit and centigrade scales agree to________________?
A. 40
B. 542
C. 15.5
D. 273
The size of one degree of Celsius is equal to_________________?
A. 3.2 degrees of Fahrenheit scale
B. 1.8 degrees of Fahrenheit scale
C. One degree of Fahrenheit scale
D. 2.12 degrees of Fahrenheit scale
According to Pascals law the pressure of gas in a vessel is_____________?
A. Same only along opposite directions
B. Same in all direction
C. Different in different direction
D. Same only along normal directions
Which one is true for internal energy ?
A. It is sum of all forms of energies associated with molecules of a system
B. It is proportional to transnational K.E of the molecules
C. It is a state function of a system
D. All are correct
Standard condition STP refer to a gas at ___________________?
A. 760mm 273K
B. 76cm 0°C
C. 1atm 273K
D. all of the above
At what temperature is the Fahrenheit scale reading equal to twice that of the Celsius scale?
A. 280°C
B. 460°C
C. 360°C
D. 160°C
The area enclosed by the curve ABCDA for a Carnot heat engine represents the work done by Carnot engine_______________?
A. averagely
B. at any instant
C. during its operation
D. during one cycle
For a gas obeying Boyles law if the pressure is doubled the volume becomes________________?
A. four times
B. one half
C. double
D. one fourth
Triple point of water is_____________________?
A. 273K at 61.6 Kpa
B. 273°C at 6.11 Kpa
C. 273.16°C at 0.611 Kpa
D. 273.16K at 750 Kpa
Which of the following properties of molecules of a gas is same for all gases at particular temperature ?
A. momentum
B. velocity
C. mass
D. kinetic energy
Boltzman constant K in terms of universal gas constant R and Avagadros number Na is give as_______________?
A. K = Na/Ra
B. K = R/Na
C. K = RNa
D. K = nRNa
Average translational kinetic energy per molecule of an ideal gas is given by_____________?
A. 2NaT/3
B. 3NaT/2R
C. 3RT/2Na
D. 3Na/2RT
In which process entropy remains constant________________?
A. isochoric
B. isobaric
C. adiabatic
D. isothermal
Adiabatic process is also called______________?
A. Heating process
B. Heat exchange process
C. Isentropic process
D. All of the above
The work done in the isochoric process is________________?
A. variable
B. constant
C. zero
D. depends on situation
For the successful operation of Heat engine which condition should be met ?
A. operated at certain temperature difference
B. cyclic process
C. both A and B
D. none of these
The purpose of flywheel in the engines is________________?
A. to smooth out the energy variation
B. to start engine
C. to add more weight to engine to work it stable
D. both A and B
Petrol engine is a________________?
A. SI engine
B. C.I engine
C. IC engine
D. all the above
Which quantity is a state function_______________?
A. internal energy
B. pressure
C. heat supply
D. volume
The unit of entropy is________________?
A. J.K
B. N.m/sec
C. J/K
D. Kgm2/sec2.K
The performance of a refrigerator is described by________________?
A. coefficient of performance
B. efficiency
C. both A and B
D. not described
In which process all the heat supplied is converted into work done ?
A. isothermal
B. isobaric
C. isochoric
D. isentropic
The value of γ for diatomic gas is_______________?
A. γ = 1.3
B. 1.4
C. 1.67
D. None
A stone is thrown upward from the top of a 59.4m high cliff with an upward velocity component of 19.6m/s how long is the stone in the air?
A. 5.00 s
B. 4.00 s
C. 6.00 s
D. 7.00 s
The average acceleration caused by gravity per second is____________?
A. 52 feet
B. 32 feet
C. 22 feet
D. 42 feet
Which of the following branch of Physics deals with the internal structure of earth?
A. Plasma physics
B. Geophysics
C. Biophysics
D. Atomic physics
Name the SI unit having the symbol cd?
A. Candela
B. Ampere
C. Cm
D. Second
The symbol of the prefix used for Mega is_______?
A. h
B. G
C. M
D. E
Which of the following is not derived quantity________?
A. Time
B. Volume
C. Density
D. Area
The least count of Vernier caliper is ________ containing 10 Vernier scale divisions?
A. 0.01mm
B. 0.001mm
C. 0.1mm
D. 0.0001mm
Which one of the following is not vector quantity _______?
A. Displacement
B. Acceleration
C. Speed
D. Force
Who were the pioneers of Physics?
A. Latin
B. Greek
C. Egyptians
D. Persians
Which of the following waves have smallest velocity in vacuum?
A. Infra-Red
B. Sound
C. Ultraviolet
D. Micro
The turning effect of force is called_________?
A. Moment
B. Torque
C. Momentum
D. None of these
The most suitable unit for expressing nuclear radius is_______?
A. Micro
B. Angstrom
C. Nano meter
D. Fermi
Which one of the following is not a radioactive element ?
A. Cadmium
B. Radium
C. Thorium
D. Uranium
Oil rises up to wick in a lamp because_____________?
A. Oil is volatile
B. Oil is very light
C. Diffusion of oil through the wick
D. Capillary action phenomenon
Newton’s Third Law of Motion?
A. every action there is an equal and opposite reaction.
B. volume of a given mass of gas increases or decreases
C. attraction or repulsion between two charges
D. temperature remaining constant, volume of a given mass of a gas varies inversely
Medium which sends signal from source to destination is known as ________ ?
A. Receiver
B. Transmission channel
C. Transmitter
D. Hardware
Joule Thomson effect is based upon __________ ?
A. Cooling of gases
B. Sudden expansion of gases
C. Sudden compression of gases
D. Heating of gases
Rutherford in his atomic model could not explain behavior of ___________ ?
A. Electrons
B. Neutrons
C. Protons
D. Neutrino