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Decibel is the unit used for
Conversion of chemical energy into electrical energy occurs in
When was ISRO set up ?
Which of the following pairs is incorrect ?
To an astronaut in a spacecraft, the sky appears to be
Metal are good conductors, because
Plimsoll line is a reference line in a
In the process of dialysis, used on patients with affected kidneys, the phenomenon involved is
Danger signals are generally red as red light
A simple microscope consists of
Which of the following produces more severe bums ?
The sudden fall of atmospheric pressure indicates
Magnetism in materials is due to
‘Short-sight’in human eye can be corrected by using proper
Who invented optical fibre ?
A multimeter is used to measure
Diamonds are glittering and attractive because light incident on them undergoes
Which of the following is used to split white light into different colours ?
Nuclear reactors used to produce electricity are based on
Submerged objects can be located using
Which one of the following instruments is used to study dispersion of light ?
A fountain pen works on the principle of
Pycnometer is an instrument used to measure the
Fibre optics work on the principle of
A decibel is
Remote-sensing device has an inbuilt source of
What material is used to make electric heater coil ?
The standard audible capacity of a healthy human being as per World Health Organisation is in the range of
An oil drop spreads over water because
The device which converts AC to DC is
What is colour of light related to?
What principle/law explains the working of the hydraulic brakes in automobiles?
The best conductor of heat among the following is
What is viewed through an electron microscope?
What apparatus is used to locate a submerged object?
Who invented the last
The instrument which uses sound waves to measure the depth of oceans is
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:
Clear nights are colder than cloudy nights because of
What is ‘Teletext’ ?
Speed of sound is the greatest in :
A gas thermometer is more sensitive than a liquid thermometer because a gas:
Which one of the following is used for sun glasses ?
Energy crisis is a consequence of
Good conductor of electricity is
Who invented Radar ?
Which of the following is a nonrenewable source of energy ?
Solar energy is convert into chemical energy during
Which of the following is an important cause for global warming?
What happens to atmospheric pressure with increase in altitude?