Que- A person is hurt on kicking a stone due to
a. Inertia
b. Velocity
c. Reaction
d. Momentum
Answer- Reaction
Que- 1 Joule is Equal to
a. 10^3 ergs
b. 10^6 ergs
c. 10^7 ergs
d. 10^5 ergs
Answer- 10^7 ergs
Que- A dynamo is a device which
a. Creates mechanical energy
b. Creates electrical energy
c. Converts mechanical energy into electrical energy
d. Converts electrical energy into mechanical energy
Answer- Converts mechanical energy into electrical energy
Que- A dynamo is used to convert
a. Mechanical energy into electrical energy
b. Electrical energy into mechanical energy
c. Electrical energy into magnetic energy
d. Magnetic energy into mechanical energy
Answer- Mechanical energy into electrical energy
Que- A photo-electric cell converts
a. Mechanical energy to electric energy
b. Heat energy to mechanical energy
c. Light energy to chemical energy
d. Light energy to electrical energy
Answer- Light energy to electrical energy
Que- Dynamo is a device for converting
a. Heat energy into electrical energy
b. Mechanical energy into electrical energy
c. Magnetic energy into electrical energy
d. Chemical energy into electrical energy
Answer- Mechanical energy into electrical energy
Que- Tungsten is used for the manufacture of the filament of an electric bulb, because
a. It is a good conductor
b. It is economical
c. It is malleable
d. It has a very high melting point
Answer- It has a very high melting point
Que- In a filament type light bulb most of the electric power consumed appears as
a. Visible light
b. Infra-red rays
c. Ultra-violet rays
d. Fluorescent light
Answer- Infra-red rays
Que- Which of the following metals is used for the manufacture of heating elements provided in electric iron ?
a. Nickel
b. Chromium
c. Nichrome
d. Tungsten
Answer- Nichrome
Que- When an electric bulb breaks, there is an explosive sound. That is due to
a. The chemical reaction between the gases inside the bulb
b. The compressed gases inside rushing out suddenly
c. The air outside rushing in to fill the vacuum inside the bulb
d. None of these
Answer- The air outside rushing in to fill the vacuum inside the bulb
Que- Flemings ''Left hand Rule" is associated with the effect of
a. Electric field on current
b. Magnetic field on magnet
c. Electric field on magnet
d. Magnetic Field on current
Answer- Magnetic Field on current
Que- Which tube used to produce X-ray?
a. Coolidge tube
b. X-ray tube
c. Roentgen
d. None of these
Answer- Coolidge tube
Que- A Fuse wire is characterised by
a. High resistance and low melting point
b. High resistance and high melting point
c. Low resistance and high melting point
d. Low resistance and low melting point
Answer- High resistance and low melting point
Que- When the main switch of the house is put off it disconnects the
a. Live wire only
b. Live wire and the earth wire
c. Live wire and the neutral wire
d. Earth wire and the neutral wire
Answer- Live wire and the neutral wire
Que- Electric power is measured in units of
a. Volt
b. Joule
c. Watt
d. Ampere
Answer- Watt
Que- Find the current (in A) when a charge of 500 Coulomb flows in 25 seconds.
a. 12500
b. 20
c. 40
d. 6250
Answer- 20
Que- The fuse in an electric circuit is connected in
a. Series with neutral
b. Parallel to live
c. Parallel to neutral
d. Series with live
Answer- Series with live
Que- Working of safety fuses depends upon (01) magnetic effect of the current (02) chemical effect of the current (03) magnitude of the current (04) heating effect of the current. Select the correct answer using the code given below.
a. 1, 2, 3 and 4
b. 1, 2 and 3 only
c. 3 and 4 only
d. 4 only
Answer- 3 and 4 only
Que- During thunderstorm you are travelling in a car. To protect yourself from the lightning you will have to
a. Remain in the car
b. Get out of the car and lie flat in the ground
c. Abandon the car and take shelter under a nearby tree
d. Touch the nearest electric pole
Answer- Remain in the car
Que- The unit of electrical power is
a. Bolt
b. Watt
c. Kilowatt hour
d. Ampere
Answer- Watt
Que- Safety fuse wire used in domestic electrical appliances is made of metal of low
a. Resistance
b. Melting point
c. Specific gravity
d. Conductance
Answer- Melting point
Que- Which of the following is not true about X-rays?
a. Have low penetrating power
b. Travel with the speed of light
c. Can be reflected or refracted
d. Can affect photographic plates
Answer- Have low penetrating power
Que- X–rays are
a. Positively charged particles
b. Negatively charged particles
c. Neutral particles
d. None of these
Answer- Neutral particles
Que- X-rays region lies between
a. Ultraviolet and visible region
b. Visible and infra-red region
c. Gamma-rays and ultraviolet region
d. Short radio waves and long radio waves
Answer- Gamma-rays and ultraviolet region
Que- In the absence of ozone layer, which rays will enter into atmosphere?
a. Infrared
b. Visible
c. Ultraviolet
d. X-rays
Answer- Ultraviolet
Que- In MRI machine, which one of the following is used?
a. Sound wave
b. X-ray
c. Ultra-sound wave
d. Magnetic wave
Answer- Magnetic wave
Que- According to Rutherford's atomic model, the electrons inside an atom are
a. Centralized
b. Not Stationary
c. Stationary
d. None of these
Answer- Not Stationary
Que- Electrons carry a
a. Positive Charge
b. Negative Charge
c. Variable Charge
d. Neutral Charge
Answer- Negative Charge
Que- An atom with more neutrons than protons is called
a. Compound
b. Element
c. Isotope
d. None of the above
Answer- Isotope
Que- What part of the atom has a positive charge?
a. Neutron
b. Proton
c. Electron
d. All the above
Answer- Proton
Que- Who was the first scientist to discover Electrons?
a. Albert Einstein
b. Isaac Newton
c. J.C. Bose
d. J.J Thompson
Answer- J.J Thompson
Que- By how many times are the Electrostatic forces stronger than the Gravitational Forces for a fixed distance?
a. 102
b. 1036
c. 1012
d. 2
Answer- 1036
Que- Which is the point from where an azimuth originates?
a. South
b. North
c. East
d. West
Answer- North
Que- The weight of a body acts through the centre of
a. Gravity
b. Mass
c. Both (A) and (B)
d. Buoyancy
Answer- Gravity
Que- If the spinning speed of the earth is increased then the weight of body at the equator
a. Increases
b. Decreases
c. Same
d. Double
Answer- Decreases
Que- At what temperature do the Fahrenheit and Celsius scales give the same reading?
a. 212 degrees
b. 32 degreees
c. -40 degreees
d. 0 degreees
Answer- -40 degreees
Que- The temperature of a liquid is 32° F. What is its temperature in Celsius scale?
a. 32° C
b. 0° C
c. 100° C
d. 212° C
Answer- 0° C
Que- To convert temperature from Celcius to Kelvin scale, you must ________ the given temperature.
a. Subtract 273
b. Multiply 273
c. Add 273
d. Divide by 273
Answer- Add 273
Que- 0°K is equivalent to
a. 273°C
b. – 273°C
c. 0°C
d. 100°C
Answer- – 273°C
Que- In very cold countries alcohol is used as a thermometric liquid because
a. Alcohol is a poor conductor of heat
b. Alcohol can be coloured for its level to be seen easily
c. Its freezing point is very low
d. It will not stick to the glass tube
Answer- Its freezing point is very low
Que- Which of the following is not a part of a CRT ?
a. Phosphor screen
b. Shadow mask
c. Electron gun
d. Gas plasma
Answer- Gas plasma
Que- Slip rings are usually made of
a. Aluminium
b. Copper
c. Phosphor Bronze
d. Carbon
Answer- Phosphor Bronze
Que- The safest hammers are those with heads that are
a. Cast steel and chiseled
b. Alloy and drop-forged steel
c. Welded and alloyed
d. Chiseled and drop forged
Answer- Alloy and drop-forged steel
Que- The function of ball bearings in a wheel is :
a. To increase friction
b. To convert kinetic friction into rolling friction
c. To convert static friction into kinetic friction
d. Just for convenience
Answer- To increase friction
Que- Gear finishing operation is called
a. Burnishing
b. Hobbing
c. Shaping
d. Milling
Answer- Burnishing
Que- Supercooling is cooling of liquid ________
a. Below melting point
b. Below freezing point
c. At melting point
d. Above melting point
Answer- Below freezing point
Que- Liquids and gases never show
a. Diamagnetic property
b. Paramagnetic property
c. Ferromagnetic property
d. Electromagnetic property
Answer- Ferromagnetic property
Que- A circular plate, a cube and a sphere, all made up of same material and having the same mass, are heated to 300°C and left in a room. Which of them will have the slowest rate of cooling?
a. Circular plate
b. Cube
c. Sphere
d. All will cool at the same rate
Answer- Sphere
Que- The humidity of the air depends upon
a. Weather
b. Temperature
c. Location
d. All of the above
Answer- All of the above
Que- In a freezer ice cubes will be formed more quickly in trays made of
a. Rubber
b. Plastic
c. Aluminium
d. Wood
Answer- Aluminium
Que- Vegetables are cooked in lesser time by adding a pinch of salt while cooking because
a. Boiling point of water increases
b. Latent heat of vaporization of water decreases
c. Latent heat of vaporization of water increases
d. Boiling point of water decreases
Answer- Boiling point of water increases
Que- Which of the following is not an aerosol?
a. Mud
b. Dust
c. Smoke
d. Fog
Answer- Mud
Que- What is the process of conversion of solid state directly to gaseous state called?
a. Evaporation
b. Condensation
c. Sublimation
d. Distillation
Answer- Sublimation
Que- Solids have definite shapes.This is because
a. The forces of cohesion of the molecules within are very much less in them
b. The forces of cohesion are very large
c. The forces of adhesion are large
d. The forces of adhesion are less
Answer- The forces of cohesion are very large
Que- The amount of matter in a ball of steel is its :
a. Weight
b. Mass
c. Density
d. Volume
Answer- Mass
Que- Which Color has the Longest Wavelength?
a. Violet
b. Yellow
c. Red
d. White
Answer- Red
Que- The colour of sky appears blue due to
a. Reflection
b. Refraction
c. Scattering of shorter wave lengths
d. Dispersion
Answer- Scattering of shorter wave lengths
Que- Sun appears red in colour at sunrise and sunset due to
a. The fact that sun emits only red colour at that time
b. Red light having longer wave length scatters away
c. That sun comes out of the mountains
d. That all other colours scatter away except red
Answer- That all other colours scatter away except red
Que- Total number of colours exists in sunlight
a. 5
b. 7
c. 9
d. 10
Answer- 7
Que- When white light passes through a glass prism we get a spectrum on the other side of the prism. In the emergent beam the ray which is deviated least is
a. The violet ray
b. The red ray
c. The green ray
d. The blue ray
Answer- The red ray
Que- Electromagnet is constructed with which of the following ?
a. Steel
b. Soft Iron
c. Aluminium
d. Nickel
Answer- Soft Iron
Que- When number of turns in a coil is trippled, without any change in the length of coil, its self inductance becomes?
a. Nine times
b. Three times
c. Six times
d. One–third
Answer- Nine times
Que- Fleming's right hand rule is used to find the direction of the
a. Alternate current
b. Direct current
c. Induced current
d. Actual current
Answer- Induced current
Que- A current carrying conductor is associated with
a. A magnetic field
b. An electric field
c. An electro-magnetic field
d. An electrostatic field
Answer- An electro-magnetic field
Que- In order to make an electromagnet you need a
a. Dry cell batteries
b. Thin coated copper wire
c. Iron nail
d. All of the above
Answer- All of the above
Que- In which of the following industries is mica as a raw material?
a. Cement
b. Glass and Pottery
c. Iron and Steel
d. Electrical
Answer- Electrical
Que- Radiocarbon dating technique is used to estimate the age of
a. rocks
b. monuments
c. soil
d. fossils
Answer- fossils
Que- Identify the vector quantity from the following
a. Heat
b. Angular momentum
c. Time
d. Work
Answer- Angular momentum
Que- Large astronomical telescopes always use as objective
a. lens
b. mirror
c. combinations of lenses
d. None of the above
Answer- combinations of lenses
Que- 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
Answer- this can damage the domestic wiring due to overloading
Que- Which one of the following instruments is used to study dispersion of light ?
a. Microscope
b. Telescope
c. Spectrometer
d. Photometer
Answer- Spectrometer
Que- Which one of the following is responsible for the working of Newton's colour disc experiment ?
a. Formation of pure spectra
b. Formation of impure spectra
c. Persistence of vision
d. Principle of complementary colour
Answer- Persistence of vision
Que- An object which absorbs all colours and reflects none appears:
a. White
b. Grey
c. Blue
d. Black
Answer- Black
Que- Microphone is a device which transforms the
a. Sound signal into current signal
b. Current signal into sound signal
c. Sound signal into light signal
d. Light signal into sound signal
Answer- Sound signal into current signal
Que- Conversion of heat into electrical energy is achieved by using :
a. Ammeter
b. Hydrometer
c. Voltmeter
d. Thermocouple
Answer- Thermocouple
Que- Which one of the following has the highest value of specific heat?
a. Glass
b. Copper
c. Lead
d. Water
Answer- Water
Que- Water is not suitable as a calorimetric substance because it :
a. Has high specific heat
b. Is a good conductor
c. Has high boiling point
d. Low latent heat of vapourization
Answer- Has high specific heat
Que- Water is used in car radiator because of its
a. Low density
b. Easy availability
c. High specific heat capacity
d. Low boiling point
Answer- High specific heat capacity
Que- Water pipes in hilly areas often burst on a cold frosty night, because
a. The material of which pipes are made contracts due to cold and so breaks
b. Water in the pipes freezes and on freezing water expands, so pipes break
c. Frost makes the pipes rusty, so they break
d. None of these
Answer- Water in the pipes freezes and on freezing water expands, so pipes break
Que- Light from Sun reaches Earth in approximately
a. 3 minutes
b. 8 minutes
c. 10 minutes
d. 12 minutes
Answer- 8 minutes
Que- Through which light cannot pass?
a. Notebook paper
b. Water
c. Book
d. Sun glasses
Answer- Book
Que- The speed of light in air is
a. 3 × 108 m/s
b. 3 × 10–8 m/s
c. 8 × 103 m/s
d. Infinity
Answer- 3 × 108 m/s
Que- Eclipses occur due to which optical phenomena?
a. Reflection
b. Refraction
c. Rectilinear propagation
d. Diffraction
Answer- Rectilinear propagation
Que- When a bottle of scent is kept open in a corner of a room its odour is felt in all parts of the room. This is due to the phenomenon of :
a. Evaporation
b. Vaporisation
c. Diffusion
d. Sublimation
Answer- Diffusion
Que- When a ring of metal is heated what happens to its hole ?
a. Expands
b. Contracts
c. It expands or contracts according to its diameter
d. It expands or contracts according to its coefficient of expansion
Answer- Expands
Que- The earth is a
a. Good reflector of heat
b. Non-absorber of heat
c. Good absorber and good radiator of heat
d. Bad absorber and bad radiator of heat
Answer- Good absorber and good radiator of heat
Que- When temperature difference between liquid and its surroundings is doubled, the rate of loss of heat will:
a. Remain same
b. Double
c. Three times
d. Four times
Answer- Double
Que- The word ''insolation' means
a. Matters which insulate
b. Incoming solar radiation
c. Insoluble matters
d. None of the above
Answer- Incoming solar radiation
Que- Tap water is placed in an open pad and allowed to evaporate. After some time the temperature of water
a. Increases to a great extent
b. Increases slightly
c. Decreases slightly
d. Decreases rapidly
Answer- Decreases slightly
Que- Which is best used as a sound absorbing material in partition walls ?
a. Stone chips
b. Steel
c. Glass - wool
d. Glass pieces
Answer- Glass - wool
Que- Speed of sound is the greatest in :
a. Water
b. Air
c. Glass
d. Glycerine
Answer- Glass
Que- The pitch of sound depends on its
a. Frequency
b. Intensity
c. Velocity
d. Amplitude
Answer- Frequency
Que- What apparatus is used to locate a submerged object?
a. Radar
b. Sonar
c. Quasar
d. Pulsar
Answer- Sonar
Que- A decibel is
a. A musical instrument
b. The wavelength of noise
c. A musical note
d. A measure of sound level
Answer- A measure of sound level
Que- A hydrogen balloon floats up because of
a. Air pressure decreases with decrease in height
b. Air pressure decreases with decrease in weight
c. Weight of the balloon is less than the weight of air displaced by it.
d. The pressure inside the balloon is more than the pressure outside it
Answer- Weight of the balloon is less than the weight of air displaced by it.
Que- A boat will submerge when it displaces water equal to its own:
a. Volume
b. Weight
c. Surface area
d. Density
Answer- Weight
Que- What is the principle of a ''Life Jacket"?
a. It provides oxygen to a drowning person
b. It increases the volume of the person to keep him afloat
c. It decreases the volume of the person to keep him afloat
d. The person can sit on it like a raft
Answer- It increases the volume of the person to keep him afloat
Que- When a piece of stone is immersed in water, it displaces water of equal
a. Density
b. Specific gravity
c. Mass
d. Volume
Answer- Mass
Que- It is easier for a man to swim in sea water, than in river water because
a. The density of sea water is lesser than the density of river water
b. The density of sea water is more than the density of river water
c. The sea is-deeper than the river
d. The sea is wider than the river
Answer- The density of sea water is more than the density of river water
Que- The electrical domestic tube light gives white fluorescent light because of
a. Colision between molecules of filled gas under electric current
b. Heavy current
c. Vacuum inside the tube
d. Falling of ultra violet rays on the white inner coating of the tube
Answer- Falling of ultra violet rays on the white inner coating of the tube