Physics - 3 — MH-CET Full Length Paper MCQs with Solutions

The torque acting on a body rotating with constant angular momentum $L$ is:

An open water tank has a small orifice located $5\text{ m}$ below the free surface of water. Taking $g = 10\text{ m/s}^2$, the velocity of efflux through the orifice is:

A small spherical ball of radius $r$ falling in a viscous liquid of coefficient of viscosity $\eta$ with velocity $v$ experiences a retarding viscous drag force equal to:

The angle of contact between pure water and clean glass is:

If the temperature of an ideal black body is doubled from $300\text{ K}$ to $600\text{ K}$, the rate of radiant heat emission per unit area increases by a factor of:

The distance between two consecutive antinodes in a stationary wave of wavelength $\lambda$ is:

When an open organ pipe is sounded in its fundamental mode, the nature of stationary waves formed inside contains:

A completely unpolarized beam of light of intensity $I_0$ passes through an ideal Polaroid sheet. The intensity of the transmitted beam is:

The electrostatic potential energy stored in an electric dipole of moment $\vec{p}$ placed in a uniform electric field $\vec{E}$ at an angle $\theta$ is:

Three capacitors of values $2\mu\text{F}$, $3\mu\text{F}$, and $6\mu\text{F}$ are joined in series across a $100\text{ V}$ supply. The equivalent capacitance of the network is:

The SI unit of magnetic dipole moment is:

Lenz's law of electromagnetic induction is a direct consequence of the law of conservation of:

The total energy of an electron revolving in the second excited state ($n = 3$) of a hydrogen atom is:

A light-emitting diode (LED) emits light when it is operated in:

The dynamic resistance of a forward-biased semiconductor junction diode is defined as:

For a transistor in common-emitter configuration, the relation connecting the current amplification factors $\alpha$ and $\beta$ is:

The efficiency of a Carnot engine operating between temperatures $T_H = 600\text{ K}$ and $T_C = 300\text{ K}$ is:

A parallel-plate capacitor of plate area $A$ and separation $d$ is charged to a potential difference $V$. The energy density (energy per unit volume) in the electric field between plates is:

The force experienced by a straight wire of length $L$ carrying current $I$ oriented parallel to a uniform magnetic field $\vec{B}$ is:

The decay constant ($\lambda$) and half-life ($T_{1/2}$) of a radioactive element are connected by:

The angle between two vectors $\vec{P} = \hat{i} + \hat{j}$ and $\vec{Q} = \hat{j} + \hat{k}$ is:

The acceleration due to gravity at a depth $d$ below the surface of the Earth of radius $R$ is given by:

How much heat is required to convert $10\text{ g}$ of ice at $0^\circ\text{C}$ completely into water at $0^\circ\text{C}$? (Latent heat of fusion $L_f = 80\text{ cal/g}$):

Two sound waves of frequencies $340\text{ Hz}$ and $344\text{ Hz}$ propagate in air. The time interval between two successive maximum beat intensities is:

A ray of light traveling in water ($\mu = 4/3$) strikes the water-air interface. The critical angle for total internal reflection is:

A p-type semiconductor material is electrically:

A solid sphere and a hollow sphere of identical mass and radius roll down the same inclined plane without slipping from rest. The ratio of their linear accelerations $a_{\text{solid}} / a_{\text{hollow}}$ is:

In an electrical LC circuit with inductance $L = 20\text{ mH}$ and capacitance $C = 5\mu\text{F}$, the natural resonant angular frequency of electrical oscillations is:

Two soap bubbles of radii $3\text{ cm}$ and $4\text{ cm}$ are formed inside a vacuum chamber and coalesce isothermally. The radius of the combined bubble is:

In a conical pendulum, a bob of mass $m$ revolves in a horizontal circle of radius $r$ at a constant speed $v$. If the string makes an angle $\theta$ with the vertical, the tension $T$ in the string is given by: