What is unit of Astronomical distance ?
When a battery is connected across a circuit, its potential difference across its terminals is drop and is given by?
If the value of gravitational acceleration at a height h above the Earth’s surface is the same as that at a depth d below the Earth’s surface (with both h and d small compared to the Earth’s radius R), then
A thief stole a box with valuable article of weight ‘W’ and jumped down a wall of height h. Before he reach the ground he experienced a load o
Suppose a rocketship is receding from the earth at a speed of 2/10 th the velocity of light. A light in the rocketship appears blue to the passengers on the ship. What colour would it appear to an observer on the earth?
Rainbow is formed due to a combination of
A man inside a moving train tosses a coin, the coin falls behind him. The train is moving
A car is moving on a circular path and takes a turn. If R1 and R2 be the reaction on the inner and outer wheels respectively, then
If the radius of the earth were to shrink by one percent, its mass remaining the same, the acceleration due to gravity on the earth’s surface would
In which of the following industries is mica as a raw material?
Kicked or thrown balls, jumping animals, object thrown from a window, a missile shot from a gun, a bomb released from a bomber plane, etc are all example of?
The sun is seen before the actual sunrise because of __________.
Choose the incorrect statement ?
An aeroplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m. When it is vertically at a point A on the ground a bomb is released from it. The bomb strikes the ground at point B. The distance AB is
Consider the following statements :
The fraction of a ball floating inside the liquid depends upon
1. density of the liquid
2. mass of the ball
3. density of the ball
Which of the statements given above are correct?
The force which opposes the relative motion between different layers of liquid or gases is called
Pick out the correct statement from the following :
The motion of a projectile follows a?
The angle of reflection is equal to the angle of incidence.
What is refractive index ?
What is unit of Work and Energy ?
Which one of the following statements is not true for a person suffering from hypermetropia?
92U235 undergoes successive disintegrations with the end product of 82Pb203. The Number of a and b particles emitted are
Consider the following statements:
1. Light of longer wavelength is scattered much more than the light of shorter wavelength.
2. The speed of visible light in water is 0.95 times the speed in vacuum.
3. Radio waves are produced by rapidly oscillating electrical currents.
4. To detect the overspeeding of vehicles, police use the Doppler effect to reflected short radio waves.Which of these statements are correct?
A body of mass 4 kg is accelerated upon by a constant force, travels a distance of 5 m in the first second and a distance of 2 m in the third second. The force acting on the body is
Consider the following statements:
1. If a person looks at a coin which is in a bucket of water, the coin will appear to be closer than it really is.
2. If a person under water looks at a coin above, the water surface, the coin will appear to be at a higher level than it really is.
Which of the above statements is/are correct?
Choose the incorrect option ?
Which instrument is used in submarine to see the objects above sea level ?