NEET 2022 Question Paper Mock Test

A long solenoid of radius $1\text{mm}$ has $100\text{turns per mm}$. If $1\text{A}$ current flows in the solenoid, the magnetic field strength at the centre of the solenoid is:

The peak voltage of the AC source is equal to:

An electric lift with a maximum load of $2000\text{kg}$ (lift + passengers) is moving up with a constant speed of $1.5{\text{ms}}^{-1}$. The frictional force opposing the motion is $3000\text{N}$. The minimum power delivered by the motor to the lift in watts is: ($g=10{\text{ms}}^{-2}$)

In a Young's double slit experiment, a student observes $8$ fringes in a certain segment of screen when a monochromatic light of $600\text{nm}$ wavelength is used. If the wavelength of light is changed to $400\text{nm}$, then the number of fringes he would observe in the same region of the screen is:

A copper wire of length $10\text{m}$ and radius $\frac{10^{-2}}{\sqrt{\pi }}\text{m}$ has electrical resistance of $10\Omega$. The current density in the wire for an electric field strength of $10\text{V/m}$ is: