NEET (UG) entrance exam Question Bank Solutions for Physics

A thick current carrying cable of radius ‘R’ carries current ‘I’ uniformly distributed across its cross-section. The variation of magnetic field B(r) due to the cable with the distance ‘r’ from the axis of the cable is represented by ______

The angle between vectors `vecA = 3hati + 4hatj + 5hatk` and `vecB = 6hati + 8hatj + 10hatk` is

When a junction transistor is used as an amplifier in CE-mode, 

A liquid drop having surface energy 'E' is spread into 512 droplets of the same size. The final surface energy of the droplets is ______.

The escape velocity from the surface of earth of mass 'M' and radius 'R' is 've'. The escape velocity from the surface of a planet whose mass and radius are 3 times that of the earth, will be

In order that the heat flows from one part of a solid to another part, what is required?  

Heat energy is incident on the surface at the rate of 1000 J/min. If the coefficient of absorption is 0.8 and the coefficient of reflection is 0.1 then heat energy transmitted by the surface in 5 minutes is ______.

Consider two vectors `vec("F"_1) = 2 hat"i" + 5 hat"k"` and `vec("F"_2) = 3 hat"j" + 4 hat"k"`. The magnitude of the scalar product of these vectors is:

A toroid has a core of inner radius 20 cm and outer radius 22 cm around which 4200 turns of a wire are wound. If the current in the wire is 10 A. What is the magnetic field inside the core of toroid?

Escape velocity from a planet is v_e. If its mass is increased to 8 times and its radius is increased to 2 times, then a new escape velocity would be ______.

Units of electrical energy are ______

In a current-carrying long solenoid, the field produced does not depend upon ______

Magnetic permeability is maximum for ______

A long solenoid has 200 turns per cm and carries a current of 2.5 A. The magnetic field at the center is ______. (µ₀ = 4π × 10^-7 Wb/m-A)

Two planets A and B have the same material density. If the radius of A is twice that of B, then the ratio of escape velocity `"V"_"A"/"V"_"B"` is ______.

The escape velocity from the Earth’s surface is υ. The escape velocity from the surface of another planet having a radius, four times that of Earth and the same mass density is ______.

Find the value of the angle of emergence from the prism. The Refractive index of the glass is `sqrt3`.

A particle of mass ‘m’ is projected with a velocity υ = kV_e (k < 1) from the surface of the earth.

(V_e = escape velocity)

The maximum height above the surface reached by the particle is:

A particle of mass ‘m’ is projected with a velocity υ = kV_e(k < 1) from the surface of the earth.

(V_e = escape velocity) 

The maximum height above the surface reached by the particle is :

Find the value of the angle of emergence from the prism. Refractive index of the glass is `sqrt3`.