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The energy emitted by the Sun is due to
In a convex lens, when the object is at infinity, then the position of image is ______.
A body falls freely from a height of 80 m. Time taken to reach the ground is:
In a concave mirror which of the following pair of position of object – size of the image is correct?
I. At infinity – point sized
Two long parallel conductors are placed 8mm apart from each other carrying a current of 120 Amperes. What will be force per meter length of each one?
The point where the total mass of a body is considered to be concentrated is known as what?
Which of the following celestial bodies contains abundant quantities of helium-3, a potential source of energy?
When a detergent is added to pure water, its surface tension –
If the temperature of a place increases suddenly, the relative humidity –
The time period of a second’s pendulum is –
