NEET (UG) entrance exam Question Bank Solutions

The INCORRECT statement about Newton's second law of motion is

In photoelectric effect, the photoelectric current started to flow. This means that the frequency of incident radiations is ______.

p-n junction diode is formed

The excess pressure in a soap bubble of radius R and surface tension T is: 

Which of the following substances (A, B and C) has the highest specific heat? 

The difference between the apparent frequency of a stationary source of sound as perceived by the observer during its approach and recession is 2% of the frequency of the source. If the speed of sound in air is 300 ms^–1, then the velocity of the observer is

If the velocity of a car is given by V = (150 − 10x)^½ m/s. If a car retards their motion by applying brakes then what will be the acceleration?

An ideal gas in a container of volume 500 cc is at a pressure of 2 × 10⁵ N/m². The average kinetic energy of each molecule is 6 × 10⁻²¹ J. The number of gas molecules in the container is ______. 

Van de Graaff generator ______

The resistivity of a wire ______

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 ______.

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