According to the Newton’s Universal law of gravitation, “Every body in the universe attracts every other body with a force which is?
The weight of an object in a satellite orbiting around the earth is?
Which one of the following statements is not true about cosmic rays?
What is the relation between wavelength, frequency and velocity ?
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
How many 6mF, 200 V condensers are needed to make a condenser of 18 pF, 600 V?
Light from the star, Alpha Centauri, which is nearest to the earth after the sun, reaches the earth in
It is a straight line with –ve slope.
A radioactive nucleus A with a half life T, decays into a nucleus B. At t = 0, there is no nucleus B. At sometime t, the ratio of the number of B to that of A is 0.3. Then, t is given by :
The ratio of minimum wavelengths of Lyman and Balmer series will be
A convex lens of focal length 30 cm produces 5 times magnified real image of an object. What is the object distance?
Identify the set in which all the three materials are good conductor of electricity
Which of the following statements is/are true regarding a light wave travelling from air to glass?
1. Its frequency remains unchanged.
2. Its speed changes.
Select the correct answer using the codes given below:
If the linear momentum of a body is increased by 50%, then the kinetic energy of that body increases by _____
If a current I flows steadily through a resistor ‘R’ for a time ‘t’, then total heat energy supplied to the resistor is given by?
Sound travels at the fastest speed in
The angle of reflection is equal to the angle of incidence.
in 1666, Newton concluded that the force which caused an apple to fall to the ground and the force that kept the moon in its orbit around the earth is the ?
An astronaut on a strange planet finds that acceleration due to gravity is twice as that on the surface of Earth. Which of the following could explain this?
On a stationary sail boat, air is blown from a fan attached to the boat. The boat
Which law states, "The rate of loss of heat by a body is directly proportional to the difference in temperature between the body and the surroundings."
Metal resistors that conduct in accordance with Ohm’s law are said to be?
Sound produced at a point is heard by a person after 5 second, while the same sound is heard by another person after 6 seconds. If the speed of sound is 300 m/s, what could be the maximum and minimum distances between the two persons?
A resister carries a current I. The power dissipated is ‘P’. The power dissipated if the same resistor carries the current of 31 is?
What are audible sound waves ?
If escape velocity from the earth’s surface is 11.2 km/sec. then escape velocity from a planet of mass same as that of earth but radius one fourth as that of earth is
Sudden fall in barometer is indication of
Which of the following statements are true regarding heat?
1. Heat is a form of energy.
2. Heat can be reflected by mirror.
3. Heat is an electromagnetic radiation.
4. Heat cannot pass through a vacuum. Select the correct answer from the codes given:
The distance from the center of earth to the center of the moon’ is called as?
Consider the following statements and select the correct code.
Assertion (A) : Small glass beads fixed on traffic signals glow brightly when light falls upon them. Reason (R) : Light is totally reflected when the angle of incidence exceeds a certain critical value and light travelling in a denser medium is reflected from a rarer medium.
Pick out the correct statement from the following :