NEET 2021 Question Paper Mock Test

The electron concentration in an n-type semiconductor is the same as hole concentration in a p-type semiconductor. An external field (electric) is applied across each of them. Compare the currents in them.

A thick current 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:

A screw gauge gives the following readings when used to measure the diameter of a wire:Main scale reading: $0\text{mm}$ Circular scale reading: $52\text{divisions}$ Given that $1\text{mm}$ on main scale corresponds to $100\text{divisions}$ on the circular scale. The diameter of the wire from the above data is:

The number of photons per second on an average emitted by the source of monochromatic light of wavelength $600\text{nm}$, when it delivers the power of $3.3\times 10^{-3}\text{watt}$ will be ($h=6.6\times 10^{-34}\text{Js}$):

Water falls from a height of $60\text{m}$ at the rate of $15\text{kg/s}$ to operate a turbine. The losses due to frictional force are $10\%$ of the input energy. How much power is generated by the turbine? ($g=10{\text{m/s}}^2$)