Consider the following statements :
1. If a piece of bar magnet is broken into two
equally long pieces, the pieces will not lose the magnetic properties.
2. Magnetic properties of a substance lie in the atomic level.
Which of the statements given above is/are correct ?
The magnitude of the gravitational force with which the earth attracts the object of mass M, towards its center, is given by?
If the radius of the Earth were increased by a factor of 4 and its mass remained the same, then the acceleration due to gravity on the Earth would
If the gravitational force between two objects were proportional to 1/R (and not as 1/R2) where R is separation between them, then a particle in circular orbit under such a force would have its orbital speed v proportional to
Which instrument is used to measure sound under water ?
The force exerted on body A by body B is always directed towards body B, and acts?
Pick out the statement which is NOT correct.
Consider the following statements and select the correct code.
Assertion (A): A stick is dipped in water in a slanting position. If observed sideways, the stick appears short and bent at the surface of water.
Reason (R): The light coming from the stick undergoes scattering from water molecules giving the stick a short and bent appearance.
The weight of an object in a satellite orbiting around the earth is?
Point A is at a lower electrical potential than point B. An electron between them on the line joining them will
Consider the following statement:
The principle of total internal reflection is
applicable to explain the
1. Formation of mirage in desert.
2. Formation of image in microscope.
3. Colour of evening sky.
4. Operation of optical fibres.
Which of the statement given above are correct?
Superposition theorem is not applicable for
Consider the following statements and select the correct code.
Assertion (A): A diamond sparkles more than a glass imitation cut to the same shape.
Reason (R): The refractive index of diamond is less than that of glass.
If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same
Which instrument is used to measure changes in volume of substances ?
The lead wires should have
“C” is a universal gravitational constant and its value is?
An oil tanker is partially filled with oil and moves forward on a level road with uniform acceleration. The free surface of oil then
At the surface of earth an object falling freely experiences an acceleration of?
Refractive index of an optical medium chan geswith
1. the nature of the medium.
2. the change in the angle of incidence of the ray.
3. colour of the incident ray.
Select the correct answer using the code given below:
The SI unit of resistance is?
Which of the following properties is not possible in case of X-rays?
The charge on an electron is known to be 1.6 x 10-19 coulomb. In a circuit the current flowing is 1 A. How many electrons will be flowing through the circuit in a second?
The Universal law of gravitation must apply to?
Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this?
(i) Diffusion
(ii) Refraction
(iii) Internal reflection
Out of the following pairs, which one does not have identical dimension?
The unit of resistivity is?
A convex lens of focal length 30 cm produces 5 times magnified real image of an object. What is the object distance?