NEET (UG) entrance exam Question Bank Solutions for Physics

In the figure shown, the image of a real object is formed at the point I. AB is the principal axis of the mirror. The mirror must be:

The graph showing the dependence of intensity of transmitted light on the angle between polariser and analyser is:

The wavelength of light used in young.'s double slit experiment is λ. The intensity at a point on the screen is I where the path difference is λ/6. If I₀ denotes the maximum intensity, then the ratio of I and I₀ is ______.

A current loop placed in a magnetic field behaves like a ______

An oscillator is producing FM waves of frequency 2 KHz with a variation of 12 KHz. What is the modulating index?

Eddy currents are also known as ______

The number of possible natural oscillations of the air column in a pipe closed at one end of length 85 cm whose frequencies lie below 1250 Hz? (v = 340 m/s)

The identical conductors maintained at same temperature are given potential difference in the ratio 1 : 2. Then the ratio of their drift velocities is ______.

A ball falling in a lake of depth 300 m shows a decrease of 0.3% in its volume at the bottom. What is the bulk modulus of the material of the ball? (g = 10 m/s²)

The number of photons per second on an average emitted by the source of monochromatic light of wavelength 600 nm, when it delivers the power of 3.3 × 10⁻³ watts will be ______ (h = 6.6 × 10⁻³⁴ Js).

A uniform conducting wire of length 12a and resistance ‘R’ is wound up as a current carrying coil in the shape of,

1. an equilateral triangle of side ‘a’.
2. a square of side ‘a’.

The magnetic dipole moments of the coil in each case respectively are:

The number of photons per second on an average emitted by the source of monochromatic light of wavelength 600 nm, when it delivers the power of 3.3 × 10⁻³ watts will be ______ (h = 6.6 × 10⁻³⁴ Js)

A uniform conducting wire of length 12a and resistance ‘R’ is wound up as a current carrying coil in the shape of,

1. an equilateral triangle of side ‘a’.
2. a square of side ‘a’.

The magnetic dipole moments of the coil in each case respectively are :

The dimensional formula of JωL is ______. Take Q as the dimension of charge.

The displacement of particle is given by x = `2/lambda (1 - e^(-lambdat))`, the acceleration of particle at 2s when λ = 2s^–1 will be (Take `l`n 0.018 = – 4)

A metal plate measuring 1 cm × 20 cm × 40 cm is embedded with a side of 20 cm × 1 cm into a wall at one end and is pulled by a force 1.6 × 10⁶ N parallel to the 1 cm side at the other end. The angle through which the plate is turned is (11 = 40 × 10⁹ Pa). 

Assertion: In interference, intensity of light at a point changes with time periodically.

Reason: Light energy is propagated exactly in straight line

The wavelength of the matter wave is dependent on ______.

A vessel at rest explodes into three pieces. Two pieces having equal masses fly-off perpendicular to one another with the same velocity 30 meter per second. The third piece has three times mass of each of other piece. The magnitude and direction of the velocity of the third piece will be

The potential energy is