NEET Physics | Daily MCQs Practice Questions | 16 July 2024 | NEET Exam

The speed of sound in air at STP is 300 m/s. If the air pressure becomes double, the temperature remaining the same, the speed of sound would become

Two charges, each of 50 µC but opposite in sign, are placed 4 cm apart. The electric field intensity at a point which is at a distance of 4 cm from the mid- point of the dipole on the axial line.

Six charges of same magnitude q are placed at the six corners of hexagon of side a. The value of electric potential at the centre of the hexagon will be $\left(k=\frac{1}{4\pi {\epsilon }_o}\right)$

If the current through 3 Ω resistor is 2 A, then power dissipated in 4 Ω resistor will be

In a potentiometer circuit a cell of e.m.f. 3 V gives balancing point at 45 cm length of wire. If another cell of e.m.f. 2 V replaces the first cell, then at what length of the wire, the balancing point occurs?

Magnetic induction at the centre of a current carrying circular loop of area π square metre is 0.2 Tesla. The magnetic moment of the loop is (μο is the permeability of air)

A circular wire loop of radius r rotates about the y-axis with angular velocity ω. The normal to the loop is always perpendicular to the y-axis. At time t = 0, the normal is parallel to the z-axis. An external magnetic field $\overrightarrow{B}=B_y\hat{j} + B_z\hat{k}$ is applied. The e.m.f. (ε) induced in the loop is

In the given R-C circuit, if the voltage across the resistor is 80 volt, then the capacitance is nearly

The minimum deviation produced by the prism having refractive index $\sqrt{\raisebox{1ex}{$3$}\!\left/ \!\raisebox{-1ex}{$2$}\right.}$ as shown in the figure is

Distance of an object from the first focus of an equi- convex lens is 20 cm and distance of its real image from second focus is 80 cm. The focal length of the lens is

In Young's double slit experiment, 50 fringes are observed in the central view zone with light of wavelength 4000 Å. The number of fringes that will be observed in the same view zone with the light of wavelength 5000 Å is

The tangent of polarizing angle according to Brewster's law is numerically equal to

An electromagnetic radiation has an energy 14.4 kev. To which region of electromagnetic spectrum does it belong?

What should be the approximate velocity of an electron so that its momentum becomes equal to that of a photon of wavelength 4800 Å?

The time period of electron in the ground state of hydrogen atom is three times the time period of the electron in the second excited state of a certain hydrogen like atom (atomic number Z). The value of Z is