NEET (UG) entrance exam Question Bank Solutions for Physics

Hydraulic brakes are based on ______.

A simple pendulum has a time period of T₁ when on the earth's surface and T₂ when taken to a height R above the earth's surface, where R is the radius of the earth. The value of `"T"_2 // "T"_1` is ______. 

Two plane mirror M₁ & M₂ are placed at an angle of 120° shown in figure. A light ray is incident on M₁ at an angle of 60°; after reflection from M₁ the ray strikes M₂. The angle which the final reflected ray (after reflection from M₂) is making with the plane of mirror M₂ is ______.

Polarisation of light is the only phenomenon that establishes ______.

In photoelectric effect the photo current ______.

Bohr's model of atoms ______.

If the maximum velocity and acceleration of a particle executing SHM are equal in magnitude, the time period will be ______.

One can easily weigh the earth by calculating the mass of the earth by using the formula:

The cross-section of two pistons in a hydraulic lift are 100 cm² and 800 cm² respectively. What is the minimum force required to lift 5000 kg-wt on a large piston surface? (in kN)

A person AB of height 170 cm is standing in front of a vertical plane mirror. His eyes are at height 164 cm from ground. At what distance from P should a hole be made in the mirror so that he cannot see the top of his head?

The period of oscillation of a simple pendulum of constant length at the surface of the earth is T. Its time period inside mine will be ______.

Which of the following phenomena is not common to sound and light waves?

The resultant of two vectors `vecA` and `vecB` is `vecC`. If the magnitude of `vecB` is doubled, the new resultant vector becomes perpendicular to `vecA`, then the magnitude of `vecC` is

A uniform rectangular block of mass of 50 kg is hung horizontally with the help of three wires A, B and C each of length and area of 2m and 10mm² respectively as shown in the figure. The central wire is passing through the centre of gravity and is made of material of Young's modulus 7.5 x 10¹⁰ Nm⁻² and the other two wires A and C symmetrically placed on either side of the wire B are of Young's modulus 10¹¹ Nm⁻²  The tension in the wires A and B will be in the ratio of: 

The relation between refractive index of the medium and angle of polarisation is called

The minimum energy required to remove an electron is called ______.

Energy of an electron at infinity from nucleus is ______.

A force F = 20 + 10y acts on a particle in y-direction where F is in newton and y in metre. Work done by this force to move the particle from y – 0 to y – 1 m is:

In rotational motion of a rigid body, all particles move with

In a semiconductor diode, the barrier potential offers opposition to only