CBSE practice Questions

Physics Quiz Question and Answers

general physics quiz

General Physics Question Bank:

Ques. The planet closest to the sun is:
(a) Saturn
(b) Jupiter
(c) Pluto
(d) Mercury
Ans. (c)

Ques. The rotational motion of earth is maximum at the—
(a) North pole
(b) Tropic of Capricorn
(c) Equator
(d) Tropic of cancer
Ans. (a)

Ques. A ball is projected with a velocity of 15 m/s making an angle of 300 with the horizontal. Calculate the time of flight of the ball (Give g= 10m/s2)
(a) 1.5 Second
(b) 3.5 Second
(c) 2 Second
(d) 5 Second
Ans. (a)

Ques. Fathometer is used to measure
(a) Earthquakes
(b) Rainfall
(c) Ocean depth
(d) Sound intensity
Ans. (c)

Ques. When did western scientists first demon­strate that it was possible to produce electricity from light?
(a) 1839
(b) 1883
(c) 1888
(d) 1887
Ans. (a)

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Ques. What is the study of the production of very low temperature and the behaviour of materials at those temperatures?
(a) Iglunacy
(b) Kelvinism
(c) Cryogenics
(d) Calormetrics
Ans. (c)

Ques. A magnetron is in which common house-hold appliance?
(a) Electric blanket
(b) Microwave oven
(c) Television
(d) Blender
Ans. (c)

Ques. What electricity voltage is provided as mains power in Britain?
(a) 100 Volts
(b) 120 Volts
(c) 110 Volts
(d) 230 Volts
Ans. (d)

Ques. To what are the Pauli Exclusion Principle applied?
(a) Electrons only
(b) Fermions, e.g. leptons (including electrons), quarks, baryons and many atoms and nuclei
(c) Photons
(d) Social groupings
Ans. (b)

Ques. The dimension formulas for impulse is same as the dimensional formula for
(a) Momentum
(b) Force
(c) Torque
(d) Rate of change of momentum
Ans. (a)

Ques. A nuclear reactor works on the principle of nuclear:
(a) fusion
(b) explosion
(c) fission
(d) assimilation
Ans. (c)

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Ques. Name the layer which makes radio communication possible on the earth.
(a) Ionosphere
(b) Stratosphere
(c) Troposphere
(d) Lithosphere
Ans. (a)

Ques. A force of 70N gives an object of unknown mass an acceleration of 20m/s2. The mass of unknown object is___.
(a) 7 Kg
(b) 0.3 Kg
(c) 3.5 Kg
(d) 35 Kg
Ans. (c)

Ques. Who is called as Father of Fiber Optics ?
(a) Mario Maurer
(b) Simon Parry
(c) Narinder Singh Kapany
(d) Dr. Thomas Mensah
Ans. (c)

Ques. __ is the region in which no light reaches
(a) Penumbra
(b) Opaque
(c) Umbra
(d) Transparent
Ans. (c)

Ques. Where is El Nino, a warm current that affects the world’s weather?
(a) South Atlantic
(b) North Atlantic
(c) Arctic
(d) Pacific
Ans. (d)

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Ques. The twinkling of star is due to:
(a) reflection
(b) dispersion
(c) absorption
(d) refraction
Ans. (d)

Ques. Electrostatic precipitator is used to control:
(a) Water pollution
(b) Solid waste
(c) Noise pollution
(d) Air pollution
Ans. (d)

Ques. Which is used to measures strength ofelectric current ?
(a) Ammeter
(b) Altimeter
(c) Audiometer
(d) Electrometer
Ans. (a)

Ques. The magnetic flux through a 50- turn coil increase at the rate of 0.05 Wb/s. What is the induced emf between the ends of the coil?
(a) 2.5V
(b) 5V
(c) 3V
(d) 7V
Ans. (a)

Ques. X-rays were discovered by –
(a) Roentgen
(b) H.Davy
(c) Lavoisier
(d) Faraday
Ans. (a)

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Ques. Supersonic Jet causes pollution by thinning of
(a) CO2 layer
(b) O2 layer
(c) O3 layer
(d) SO2 layer
Ans. (c)

Ques. Which of the following is a derived unit?
(a) Mass
(b) Length
(c) Time
(d) Velocity
Ans. (d)

Ques. Carbon dioxide is called greenhouse gas because-
(a) it is used in photosynthesis
(b) its absorbs infrared radiation
(c) it emits visible radiation
(d) its concentration remains always higher than other gases
Ans. (b)

Ques.  RADAR is used for
(a) locating submerged submarines
(b) receiving a signals in a radio receiver
(c) locating geostationary satellites
(d) detecting and locating the position of objects such as aeroplanes
Ans. (d)

Ques. The Viscosity of solid is
(a) Infinite
(b) Zero
(c) Maximum
(d) Minimum
Ans. (a)

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Ques. Which of these is most attracted by a magnet?
(a) Wool
(b) Plastic
(c) Water
(d) Metal
Ans. (d)

Ques. Which types of light colours are strongly absorbed by plants?
(a) Red and Yellow
(b) Green and Yellow
(c) Blue and Red
(d) Indigo and Red
Ans. (c)

Ques. Atomic bomb is based on the principle of
(a) Nuclear Fission
(b) Nuclear Fusion
(c) Nuclear Transition
(d) Radio Emission
Ans. (a)

Ques. What is a device that allows electric cur­rent to pass through it in one direction only, used for converting AC to DC?
(a) Voltmeter
(b) Rectifier
(c) Rheostat
(d) Accumulator
Ans. (b)

Ques. What causes a screeching sound when a live microphone is put too close to a speaker?
(a) Grazeright
(b) Chewfore
(c) Eatleft
(d) Feedback
Ans. (d)

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Ques. The satellite ”Aryabhata”, launched on 19 April 1975, to conduct experiments in X-ray astronomy, aeronomics, and solar physics, was built by which country?
(a) Indonesia
(b) Arab League
(c) India
(d) Turkey
Ans. (c)

Ques. Which is NOT an acceptable method of distributing small power outlets through­
out an open plan office area?
(a) Power Poles
(b) Power Skirting
(c) Flush Floor Ducting
(d) Extension Cords
Ans. (d)

Ques. A weightless rubber balloon has 100gm of water in it. Its weight in water will be
(a) 100gm
(b) 200gm
(c) 50gm
(d) Zero
Ans. (d)

Ques. Mesons are found in
(a) Laser beam
(b) X-rays
(c) Gamma rays
(d) Cosmic rays
Ans. (d)

Ques.   __ is used to slow down neutrons emitted in a nuclear fission reaction
(a) Agent
(b) Reactors
(c) Moderators
(d) Controller
Ans. (c)

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Ques. In 1960 an international agreement defined the metre in terms of the wavelength of the light from which gas, when burnt?
(a) Oxygen
(b) Argon
(c) Krypton
(d) Neon
Ans. (c)

Ques. Railway tracks are banked on curves so that
(a) No frictional force may be produced between the tracks and wheels
(b) The train may not fall down inward
(c) Necessary centripetal force may be obtained from the horizontal component of normal reaction due to the track
(d) None of the above
Ans. (c)

Ques. Cryogenic engine find application in
(a) Submarines
(b) Super Conductivity
(c) Rocket Technology
(d) Nuclear Energy
Ans. (c)

Ques. A net force of 350 N acts on a body of mass 70 Kg which is initially at rest. Its acceleration is __ m/s2.
(a) 3
(b) 7
(c) 5
(d) 9
Ans. (c)

Ques. When an aero plane is making a loop, pilot does not fall down because his weight provides the necessary
(a) Force against gravity
(b) Centripetal force
(c) Centrifugal force
(d) Viscous force
Ans. (b)

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Ques. Which of the following is the fundamental quantity ?
(a) Volume
(b) Velocity
(c) Time
(d) Force
Ans. (c)

Ques. Zener- diode is used as :
(a) An amplifier
(b) An rectifier
(c) An oscillator
(d) Voltage regulator
Ans. (d)

Ques. The efficiency of a Cornot engine working between the steam point and ice point is
(a) 28.8 %
(b) 27.8 %
(c) 26.8 %
(d) 23.8 %
Ans. (c)

Ques. The electromagnetic waves used in the telecommunication are__.
(a) Ultraviolet
(b) Infra-red
(c) Visible
(d) Microwave
Ans. (d)

Ques. The law which gives a relation between electric potential difference and electric current is called:
(a) Faraday’s law
(b) Newton’s law
(c) Ohm’s law
(d) Oersted’s law
Ans. (c)

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Ques. Charge is a
(a) Vecor quantity
(b) Either Scalar or Vector
(c) Scalar quantity
(d) Dimensionless
Ans. (c)

Ques. Which of the following has high penetrating power ?
(a) Beta Particle
(b) Alpha Particle
(c) All of the above
(d) Gamma Rays
Ans. (d)

Ques. The size of an atomic nucleus is diameter of the atom
(a) 1/1000
(b) 1/10000
(c) 1/100
(d) 1/100000
Ans. (c)

Ques. Which of these is not one of Newton’s Laws of Motion?
(a) To every action there is an equal and opposite reaction
(b) A body at rest or moving continues in that state unless acted on by external forces
(c) When a body is acted on by a force the rate of change of momentum is proportional to the force consistent with the earth’s rotation.
(d) A pendulum will swing in a pattern
Ans. (d)

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