Q: Radiocarbon is produced in the atmosphere as a result of
A. collision between fast neutrons and nitrogen nuclei present in the atmosphere
B. action of ultraviolet light from the sun on atmospheric oxygen
C. action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere
D. lightning discharge in atmosphere
Q: It is easier to roll a stone up a sloping road than to lift it vertical upwards because
A. work done in rolling is more than in lifting
B. work done in lifting the stone is equal to rolling it
C. work done in both is same but the rate of doing work is less in rolling
D. work done in rolling a stone is less than in lifting it
Q: The absorption of ink by blotting paper involves
A. viscosity of ink
B. capillary action phenomenon
C. diffusion of ink through the blotting
D. siphon action
Q: Siphon will fail to work if
A. the densities of the liquid in the two vessels are equal
B. the level of the liquid in the two vessels are at the same height
C. both its limbs are of unequal length
D. the temperature of the liquids in the two vessels are the same
A. the heating effect of current alone
B. hysteresis loss alone
C. both the heating effect of current and hysteresis loss
D. intense sunlight at noon
Q: Nuclear sizes are expressed in a unit named
A. Fermi B. angstrom
C. newton D. tesla
Light year is a unit of
A. time B. distance
C. light D. intensity of light
A. unequal heating of different parts of the atmosphere
B. magnetic disturbances in the atmosphere
C. depletion of ozone layer in the atmosphere
D. equal heating of different parts of the atmosphere
Q: Light from the Sun reaches us in nearly
A. 2 minutes
B. 4 minutes
C. 8 minutes
D. 16 minutes
Q: Stars appears to move from east to west because
A. all stars move from east to west
B. the earth rotates from west to east
C. the earth rotates from east to west
D. the background of the stars moves from west to east
A. thrust B. pressure
C. frequency D. conductivity
Q: Planets do not twinkle because
A. they emit light of a constant intensity
B. their distance from the earth does not change with time
C. they are very far away from the earth resulting in decrease in intensity of light
D. they are nearer to earth and hence we receive a greater amount of light and, therefore minor variations in the intensity are not noticeable
Q: Metals are good conductors of electricity because
A. they contain free electrons
B. the atoms are lightly packed
C. they have high melting point
D. All of the above
A. will overflow
B. will not rise
C. depressed
D. change its meniscus
A. Pressure and Young's modules
B. Planck's constant and Angular momentum
C. Impulse and moment of force
D. Force and rate of change of linear momentum
A. velocity B. momentum
C. acceleration D. kinetic energy
Q: Pick out the scalar quantity
A. force B. pressure
C. velocity D. acceleration
Q: Rectifiers are used to convert
A. Direct current to Alternating current
B. Alternating current to Direct current
C. high voltage to low voltage
D. low voltage to high voltage
Q: out of the following, which is not emitted by radioactive substance?
A. Electrons
B. Electromagnetic radiations
C. Alpha particles
D. Neutrons
A. transverse B. longitudinal
C. electromagnetic D. polarised
Q: Magnetism at the centre of a bar magnet is
A. minimum B. maximum
C. zero D. minimum or maximum
Q: It is more difficult to walk on a sandy road than on a concrete road because
A. sand is soft and concreter is hard
B. the friction between sand and feet is less than that between concrete and feet
C. the friction between sand and feet is more than that between concrete and feet
D. the sand is grainy but concrete is smooth
A. 0.14 m/s
B. 140 m/s
C. 1.4 km/s
D. 14 m/s
Q: Of the following properties of a wave, the one that is independent of the other is its
A. amplitude B. velocity
C. wavelength D. frequency
Lux is the SI unit of
A. intensity of illumination
B. luminous efficiency
C. luminous flux
D. luminous intensity
Q: On a rainy day, small oil films on water show brilliant colours. This is due to
A. dispersion B. interference
C. diffraction D. polarization
A. move towards A
B. move towards B
C. move at right angles to the line joining A and B
D. remain at rest
Q: Materials for rain-proof coats and tents owe their water-proof properties to
A. surface tension
B. viscosity
C. specific gravity
D. elasticity
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
Q: Sound of frequency below 20 Hz is called
A. audio sounds
B. infrasonic
C. ultrasonic
D. supersonics
A. mercury is a metal
B. density of mercury is greater than that of water
C. cohesion of mercury is greater than its adhesion with glass
D. cohesion of water is greater than its adhesion with glass
Q: Suitable impurities are added to a semiconductor depending on its use. This is done in order to
A. increase its life
B. enable it to withstand higher voltages
C. increase its electrical conductivity
D. increase its electrical resistivity
A. the intensity of light emitted by them changes with time
B. the distance of the stars from the earth changes with time
C. the refractive index of the different layers of the earth's atmosphere changes continuously, consequently the position of the image of a start changes with time
D. the light from the star is scattered by the dust particles and air molecules in the earth's atmosphere
Q: It takes much longer to cook food in the hills than in the plains, because
A. in the hills the atmospheric pressure is lower than that in the plains and therefore water boils at a temperature lower than 100oC causing an increase in cooking time
B. due to low atmospheric pressure on the hills, the water boils at a temperature higher than 100oC and therefore water takes longer to boil
C. in the hills the atmospheric density is low and therefore a lot of heat is lost to the atmosphere
D. in the hills the humidity is high and therefore a lot of heat is absorbed by the atmosphere leaving very little heat for cooking
A. vector B. scalar
C. phasor D. tensor
Q: Of the following natural phenomena, tell which one known in Sanskrit as 'deer's thirst'?
A. Rainbow B. Earthshine
C. Halo D. Mirage
Inside an aeroplane, flying at a high altitude,
A. the pressure is the same as that outside
B. normal atmospheric pressure is maintained by the use of air pumps
C. the pressure inside is less than the pressure outside
D. normal humidity and partial vacuum are maintained
A. Water, iron and air
B. Iron, air and water
C. Air, water and iron
D. Iron, water and air
Q: One thousand microns is equal to
A. 10-3m B. 10-6m
C. 10-9m D. 10-12m
Q: Sound travels at the fastest speed in
A. steel B. water
C. air D. vacuum
Q: oil raise up the wick in a lamp. The principle involves
A. the diffusion of oil through the wick
B. the liquid state of oil
C. capillary action phenomenon
D. volatility of oil
Q: Superconductors are substances which
A. conduct electricity at low temperature
B. offer high resistance to the flow of current
C. offer no resistance to the flow of electricity
D. conduct electricity at high temperatures
Q: Light travels at the fastest speed in
A. glass B. water
C. hydrogen D. vacuum
Q: Railway tracks are banked on curves
A. necessary centrifugal force may be obtained from the horizontal component weight of the train
B. to avoid frictional force between the tracks and wheels
C. necessary centripetal force may be obtained from the horizontal component of the weight of the train
D. the train may not fly off in the opposite direction
A. metals have higher thermal capacity than plastics
B. plastics have a lower density than metals
C. metals are good conductor of heat
D. plastics have a higher thermal conductivity than metals
A. 1.8 km, 0.15 km
B. 2.2 km, 0.20 km
C. 2.8 km, 0.25 km
D. 3.3 km, 0.30 km
Q: Intensity of sound at a point is ____ its distance from the source.
A. directly proportional to
B. inversely proportional to
C. directly proportional to square of
D. inversely proportional to square of
A. at sea level
B. at the top of Mt. Everest
C. at a place in a valley below sea level
D. in an aeroplane flying at a height of 10,000 m with inside pressure maintained at the sea level
Radio telescopes are better than optical telescopes because
A. they can detect faint galaxies which no optical telescope can
B. they can work even in cloudy conditions
C. they can work during the day and night
D. All of the above
Q: Light Emitting Diodes (LED: is used in fancy electronic devices such as toys emit
A. X-rays
B. ultraviolet light
C. visible light
D. radio waves
Q: Out of the following pairs, which one does not have identical dimension?
A. Moment of inertia and moment of a force
B. Work and Torque
C. Angular momentum and Planck's constant
D. Impulse and Momentum
Q: Mercury is commonly used as a thermometric fluid rather than water because
A. specific heat of mercury is less than water
B. specific heat of mercury is more than water
C. mercury has greater visibility than water
D. density of mercury is more than the water
A. principle of refraction
B. total internal reflection
C. scattering
D. interference
A. 4.2 seconds
B. 42 seconds
C. 4.2 years
D. 42 years
Supersonic plane fly with the speed
A. less than the speed of sound
B. of sound
C. greater than the speed of sound
D. of light
Q: Mach number is used in connection with the speed of
A. sound B. aircraft
C. spacecraft D. ships
Q: On a stationary sail boat, air is blown from a fan attached to the boat. The boat
A. moves in opposite direction in which the air is blown
B. does not move
C. moves in the same direction in which air blows
D. spins around
A. absorption of sunlight in minute water droplets
B. diffusion of sunlight through water droplets
C. ionisation of water deposits
D. refraction and reflection of sunlight by water droplets
Q: Stars which appear single to the naked eye but are double when seen through a telescope are
A. novas and supernovas
B. binaries
C. asteroids
D. quasars
Q: ML2T-2 is the dimensional formula for
A. moment of inertia
B. pressure
C. elasticity
D. couple acting on a body
Q: Solar eclipse will take place when
A. the sun is between the moon and the earth
B. the earth is between the moon and the sun
C. the moon is between the sun and the earth
D. the moon does not lie on the line joining the sun and the earth
Q: Isotopes of an element contain
A. the same number of protons but different number of neutrons
B. the same number of neutrons but different number of protons
C. equal number of protons and electrons
D. equal number of nucleons
Q: One watt-hour is equivalent to
A. 6.3 x 103 J
B. 6.3 x 10-7 J
C. 3.6 x 103 J
D. 3.6 x 10-3 J
A. Scattering
B. Diffraction
C. Interference
D. Polarization
Q: In which of the following industries is mica as a raw material?
A. Cement
B. Glass and Pottery
C. Iron and Steel
D. Electrical
Q: Radiocarbon dating technique is used to estimate the age of
A. rocks B. monuments
C. soil D. fossils
Q: Identify the vector quantity from the following
A. Heat
B. Angular momentum
C. Time
D. Work
Q: Large astronomical telescopes always use as objective
A. lens
B. mirror
C. combinations of lenses
D. None of the above
Q: One should not connect a number of electrical appliances to the same power socket because
A. this can damage the appliances due to overloading
B. this can damage the domestic wiring due to overloading
C. this can damage the electrical meter
D. the appliance will not get full voltage
I.Diffusion
II.Refraction
III.Internal reflection
A. I, II and III
B. I and II
C. II and III
D. I and III
Q: Natural radioactivity was discovered by
A. Marie Curie
B. Ernest Rutherfor
C. Henri Becquerel
D. Enrico Fermi
A. luminous heavenly bodies revolving around a star
B. non-luminous heavenly bodies
C. luminous heavenly bodies that twinkle
D. luminous heavenly bodies that do not twinkle
A. 10-6m
B. 10-8m
C. 10-9m
D. 10-5m
Q: Mica is used in electrical appliances such as electric iron because mica is
A. a good conductor of heat but a bad conductor of electricity
B. a bad conductor of heat but a good conductor of electricity
C. a good conductor of heat as well as electricity
D. a bad conductor of heat as well as electricity
Q: It is easier to roll a barrel full of coal tar than to pull it because
A. the full weight of the barrel comes into play when it is pulled
B. the rolling friction is much less than the sliding friction
C. more surface area of the barrel is in contact with the road when it is pulled
D. coal tar is a liquid and it flows in the barrel when it is rolled
Q: Minimum number of unequal vectors which can give zero resultant are
A. two
B. three
C. four
D. more than four
A. an object existence
B. a subject existence
C. no existence
D. both subjective and objective existence
A. east
B. west
C. northeast
D. southeast
A. 1200 m
B. 0.33 km
C. 3.33 km
D. 33 km