Physics: MCQ Test
50 questions · pick one option for each · submit when you finish to see your score and the correct answers.
Question 1 of 50
What are the primary colors in photography?
- ARed, Blue, Yellow
- BRed, Yellow, Green
- CRed, Blue, Green
- DBlue, Yellow, Green
Question 2 of 50
The apparent weight of a person in a lift is less than the actual weight when the lift is going
- Aup with acceleration
- Bdown with acceleration
- Cup with the same speed
- Ddown at the same speed
Question 3 of 50
Diopter is the unit of what?
- Apower of the lens
- Bfocal length of the lens
- Cof the intensity of light
- Dintensity of sound
Question 4 of 50
The SI unit of power 'Watt' is equivalent to what?
- Akg m s 2
- Bkg m 2 to 2
- Ckg m2 to 3
- Dnone of these
Question 5 of 50
The machine gun was invented by-
- AJ.L. by baird
- Bby G. Broussa
- Cby Karl Benz
- Dby James Puckle
Question 6 of 50
Doppler effect is related to-
- Asound
- Bpopulation
- CPsychology
- Dcurrency circulation
Question 7 of 50
If you touch an iron block and a wooden block in the morning during cold days, the iron block feels colder because-
- AThe temperature of an iron block is lower than that of a wooden block
- BIron is a better conductor of heat than wood
- CIron is a poor conductor of heat compared to wood.
- DIron block is heavier than wood
Question 8 of 50
Which one of the following pairs is not correctly matched?
- AOdometer – A device for measuring the distance traveled by the wheels of a vehicle
- BOndometer – an instrument for measuring the frequency of electromagnetic waves
- CAudiometer – Sound intensity measuring device
- DAmmeter - an instrument for measuring electrical power
Question 9 of 50
A fuse is installed in the electrical supply mesh as a safety device. Which statement is correct regarding electrical fuses?
- AIt is connected in parallel with the mains switch
- BIt is mainly made of silver alloys.
- CIts melting point is low
- DIts resistance is very high.
Question 10 of 50
The temperature of an object indicates that on contact the heat-
- Awill flow from that object to an object at a higher temperature
- Bflow from an object of relatively lower temperature to that object
- Cflow from that object to the earth
- Dflow from the Earth to that object
Question 11 of 50
The position and direction of any object, whether stationary or moving, remain unchanged unless an external force acts on it. This is—
- ANewton's first law of motion
- BNewton's second law of motion
- CNewton's third law of motion
- DGalileo's law of motion
Question 12 of 50
Which of the following are used as electrolytes in a dry match (battery)?
- AAmmonium chloride and zinc chloride
- Bsodium chloride and calcium chloride
- CMagnesium Chloride and Zinc Chloride
- DAmmonium chloride and calcium chloride
Question 13 of 50
Which of the following phenomena helps in deciding that light is a transverse wave?
- Ainterference
- BDiffraction
- Cpolarization
- DRefraction
Question 14 of 50
Which of the following is marked on commonly used fluorescent tube lights?
- A220 K
- B273 K
- C6500 K
- D9000 K
Question 15 of 50
Whose radiation can a black body absorb?
- Aonly low wavelengths
- Bintermediate wavelengths only
- Chigh wavelength only
- Dall wavelengths
Question 16 of 50
What is one barrel of oil approximately equal to?
- A131 liters
- B159 liters
- C257 liters
- D321 liters
Question 17 of 50
The algebraic sum of the currents meeting at a point in a circuit is-
- Ainfinite
- BZero
- Cbetween zero and infinity
- Dnone of the above
Question 18 of 50
The value of one kilowatt hour (kWh) is-
- A36×10 6J
- B3.6×103J
- C100 J
- D10 J
Question 19 of 50
To a person sitting suspended in water, his leg appears bent and short.
- ACauses of refraction
- Bdue to reflection
- CCauses of diffraction
- Ddue to dispersion
Question 20 of 50
Einstein was awarded the Nobel Prize for-
- Afor photoelectric effect
- BFor the theory of specific heats
- CFor the special theory of relativity
- Dfor Bose-Einstein statistics
Question 21 of 50
The water from the hand pump is hot in winter because-
- AIn winter our body is cold, hence water appears warm.
- BThe temperature inside the Earth is higher than the temperature in the atmosphere
- CThe pumping action creates friction, which heats the water.
- DWater from inside comes out and absorbs heat from the surroundings
Question 22 of 50
The principle of cleaning surfaces with soap is based on-
- Aon viscosity
- Bon flotation
- Con elasticity
- Don surface tension
Question 23 of 50
Why do pendulum clocks slow down in summer?
- ABecause of the long summer days
- Bdue to friction in the coil
- CThe length of the pendulum increases, which increases the time taken for a single oscillation.
- DThe weight of the pendulum increases in summer
Question 24 of 50
Why do bicycle tubes burst mostly in summer?
- AThe tube bursts due to heat.
- BRubber becomes very weak due to heat.
- CHeat causes the rubber to harden and not expand to accommodate air.
- Dnone of the above
Question 25 of 50
Cyclotron is used to accelerate what?
- ANeutron
- BProton
- Cnuclear
- Dions
Question 26 of 50
Why is a small space left at the junction of two railway tracks?
- ABecause leaving such places will save some costs.
- BBecause metal expands when heated and contracts when cooled
- Cto generate the necessary gravitational force
- Dnone of these
Question 27 of 50
The velocity of light is-
- A3x108 cm/sec
- B3 x 10 8m/sec
- C3x108 km/sec
- D3 x 108mile/sec
Question 28 of 50
The principle of transformer is based on-
- Aon the principle of magnetic induction
- Bon the principle of electromagnetic induction
- Con the principle of self-induction
- Don the principle of mutual induction
Question 29 of 50
One picogram is equal to-
- A10-6 g
- B10-9 g
- C10-12 g
- D10-15 g
Question 30 of 50
How much is 1 volt equal to?
- A1 joule
- B1 joule/coulomb
- C1 newton coulomb
- D1 joule/newton
Question 31 of 50
Which one of the following statements is not correct about sound?
- Asound travels slower than the speed of light
- BSound travels faster in humid air than in dry air
- Csound waves are longitudinal waves
- Dsound waves are longitudinal waves
Question 32 of 50
"The potential difference across the ends of a conductor is directly proportional to the current flowing through it." This law is-
- ACoulomb's law
- BFaraday's law
- CJoule's law
- DOhm's law
Question 33 of 50
Capillarity is not the sole reason for which one of the following?
- Aink adsorption
- Bgroundwater upwelling
- CSpreading of a water drop on a cotton cloth
- Dthe movement of water from a plant's roots to its foliage
Question 34 of 50
"For every action there is an equal and opposite reaction." This is
- ANewton's first law of motion
- BNewton's second law of motion
- CNewton's third law of motion
- Dnone of the above
Question 35 of 50
The temperature of a liquid increases due to its vaporization.
- Awill increase
- Bwill decrease
- Cwill grow rapidly
- Dwill remain unchanged
Question 36 of 50
The nucleus of an atom contains-
- Aprotons and electrons
- Bneutrons and electrons
- Cjust electrons
- Dneutrons and electrons
Question 37 of 50
Which of the following works on the basis of conservation of linear force?
- ARocket
- Bhelicopter
- CJet
- Dplane
Question 38 of 50
When two or more resistances are connected in series with each other, they are connected in _______.
- Ain order of rank
- Bin parallel order
- Cstraight
- Din line
Question 39 of 50
The characteristic of a superconductor is-
- AHigh permeability
- Blow permeability
- CZero permeability
- DInfinite permeability
Question 40 of 50
The technique used to investigate the stomach or other internal organs of the body is based on endoscopy.
- Aon the phenomenon of total internal reflection
- BOn interference phenomena
- COn the phenomenon of diffraction
- Don the phenomenon of polarization
Question 41 of 50
Who invented X-rays?
- AHopkins
- BRoentgen
- CMarconi
- DMorse
Question 42 of 50
It is easier to roll a wooden cylindrical barrel than to drag it because-
- AWhen it is pulled, the weight of the object acts
- BThe force of friction in the rolling state is much less than the force of friction in the sliding state.
- CThe barrel has a larger surface area in contact with the road when towing.
- DAny option other than the above
Question 43 of 50
How many calories are in a joule?
- A0.24
- B0.44
- C0.54
- D0.64
Question 44 of 50
If a person stands between two plane mirrors inclined at an angle of 60°, how many images will he see?
- A3
- B4
- C5
- D6
Question 45 of 50
A liquid droplet assumes a spherical shape
- Adue to surface tension
- Bdue to viscosity
- Cdue to upward thrust
- Ddue to gravity
Question 46 of 50
Photoelectric effect was propounded by-
- ACompton
- BMaxwell
- CEinstein
- DNewton
Question 47 of 50
The inventor of 'scooter' is-
- ABroad Shaw
- BDaimler
- CEinstein
- DFarmich
Question 48 of 50
100 W electric bulb is used for 10 hours a day. How many units of energy will be used in 30 days?
- A1
- B10
- C30
- D300
Question 49 of 50
Which type of mirror is used in the headlights of vehicles?
- Aplane mirror
- Bconvex mirror
- Cconcave mirror
- DParabolic mirror
Question 50 of 50
Which finger shows the direction of current in Fleming's left hand rule?
- Aindex finger
- Bmiddle finger
- CThumb
- Dring finger