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A person can jump higher on the Moon’s surface than on the Earth because
The purpose of choke in a fluorescent lamp is
The apparent weight of a man in a lift is less than the real weight when
Rainbows are produced when sunlight
The velocity of sound in moist air is more than in dry air because the moist air has
The least penetrating power ray is
X-rays can be used
Ice is packed in saw dust because
It is easy to burst a gas-filled balloon with a needle than with a nail. It is because
Electric current is measured using which of the following instrument?
The dynamo converts
A fuse wire is characterized by
For a missile launched with a velocity, less than the Earth’s escape velocity, the total energy is
Cyanide poisoning causes death in seconds because
When one gene pair hides the effect of the other unit. The phenomenon is referred to as
To an astronaut in space the sky will appear to be
On a rainy day, small oily films on water show brilliant colours. This is due to
Rainbow formation is due to
The total energy of an electron inside an atom is
The velocity of light is
A seconds pendulum is a pendulum whose time period is
A jug is filled to the brim with water at 0°C. A piece of ice floats in it. The moment the ice melts:
Herman Hollerith had perfected his tabulating system and developed a machine called
Absorption of water from cut ends of stems disproves the
The loss of water in the form of water droplets is called
The metal used for making aircrafts and rickets is
The colours of stars depend on their
Radar is used to
Optical fibre works on the principle of
Radio Carbon Dating is used to estimate the age of
A satellite in vacuum
Communication satellites are used to
‘Farad’ is the unit of
Steel is more elastic than rubber because it
On the Moon, an astronaut cannot drink lemonade with the help of straw because
A particle moving with uniform speed
Device which uses sound waves for detection and ranging is called
Earth is a very big magnet. In which direction does its magnetic field extend?
Which colour/colour of light has the highest velocity through vacuum?
What type of minor is used in a view finding mirror of a vehicle?
We receive sunlight on earth surface. What type of light beams are these?
‘Shock-absorbers’ are usually made of steel as it
The time period of a pendulum when taken to the Moon would
The atmospheric air is held to the Earth by
The function of ball bearings in a wheel is
Lambert’s law is related to
A geostationary satellite revolves around the Earth from
Among the following materials sound travels fastest in
Which phenomenon do bats or dolphins use to find prey, predators or obstacles?
What did the first electronic digital computer contain?