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A kilowatt-hour is unit of:
Ventilators are provided near the ceiling of the room because:
The hair of shaving brush clings together when removed from water due to:
In the process of magnetisation of a bar:
A falling drop of rain water acquires the spherical shape due to:
The weakest of all fundamental forces is:
Velocity of sound in air does not change with the change of:
Nano technology deals with objects with dimensions in the range of:
Why is it difficult to breathe at higher altitudes?
The strongest force in nature is:
According to the theory of relativity, which of the following always remains constant?
The spoon dropped by an astronaut in a satellite will:
A colour-blind person cannot:
Pipelines in cold countries often burst in winter, because:
When a body is taken from earth to moon:
A mirage occurs because of:
Atomic power plant works on the principle of:
Bolometer is used to measure:
A person is hurt on kicking a stone due to:
The fuse in our domestic electric circuit melts when there is a high rise in:
Which of the following is an example for cantilever beam?
It is difficult to cook rice:
A dynamo is a device which:
A soap bubble shows colours when illuminated with white light. This is due to:
The instrument used to see the distant objects on the Earth is:
Which of the following substance is highly plastic?
Which of the following principle is used to produce ‘low-temperatures’?
A photo-electric cell converts:
Two stones of different masses are dropped simultaneously from the top of a building:
A concave lens always forms an image which is:
The modulus of rigidity is the ratio of:
The propagation of sound waves in a gas involves:
If input frequency of a full wave rectifier be n, then output frequency would be:
Heat transfer horizontally within the atmosphere is called:
Noise is measured in:
The bats can fly in the dark because:
What changes will happen to a bowl of ice and water kept at exactly zero degree Celsius?
The acceleration due to gravity at the equator:
Angle of friction and angle of repose are:
If a boy sitting in a train, which is moving at a constant velocity, throws a ball straight up into the air, the ball will:
Intensity of gravitational field of earth is maximum at:
The spokes used in the wheel of a bicycle increase its:
A transformer works on the principle of:
The sky appears blue because:
The device in communication satellites which receives signals from an earth station and transmits them to different directions is:
When a ship enters the sea from a river:
Two stones of unequal masses are thrown vertically up with the same velocity. Which of the following will happen?
The centre of gravity of a sprinter during the race lies:
Cloudy nights are warmer compared nights, because clouds mainly:
A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole?