NEET (UG) entrance exam Question Bank Solutions

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)

If E and G respectively denote energy and gravitational constant, then `"E"/"G"` has the dimensions of ______.

A uniform rod of length 200 cm and mass 500 g is balanced on a wedge placed at 40 cm mark. A mass of 2 kg is suspended from the rod at 20 cm and another unknown mass ‘m’ is suspended from the rod at 160 cm mark as shown in the figure. Find the value of ‘m’ such that the rod is in equilibrium. (g = 10 m/s²)

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)

The increase in length on stretching a wire is 0.05%. If its Poisson's ratio is 0.4, then its diameter will be: 

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

Reason: Light energy is propagated exactly in straight line

A sniper fires a rifle bullet into a gasoline tank making a hole 53.0 m below the surface of gasoline. The tank was sealed at 3.10 atm. The stored gasoline has a density of 660 kgm⁻³. The velocity with which gasoline begins to shoot out of the hole is (Take g = 10 m/s²). 

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

For a chosen non-zero value of voltage, there can be more than one values of current in

Broadcast band in which FM lies is ______.

If both the mass and the radius of the earth decrease by 1%, then the value of acceleration due to gravity will

Which of the following is three-dimensional continuous charge distribution?

Two identical flutes produce fundamental notes of frequency 300 Hz at 27°C. If the temperature of air in one flute is increased to 31°C, the number of the beats heard per second will be

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?

Which of the following processes is reversible?  

If the last band on the carbon resistor is absent, then the tolerance is ______