MHT CET 2025 Physics Paper: 23 Apr, Shift 1

A current of 5 A is flowing at 220 V in a primary coil of a transformer. If the voltage produced in the secondary coil is 2200 V and $50\%$ of power is lost, then the current in the secondary coil will be

An a. c. source is connected across a pure inductor. Which one of the following figures shows the correct phase relation between the current and e.m.f.?

In an a.c. circuit with pure capacitance ' C ' and a.c. source $E = E_0 \sin \omega t$, the equation of instantaneous current is given by

Figure shows the combination of inductances and capacitances. Resonant frequency of the $L - C$ circuit is

In hydrogen atom, the energy of electron in first and third orbit is ' $E_1$ ' and' $E_3$ ' respectively. If $E_3 = xE_1$ then the value of $x$ will be

A parallel plate air capacitor has capacity ' $C$ ' and distance of separation between plates is ' $d$ '. If a conducting sheet of thickness $\frac{2d}{3}$ is inserted in between the plates, the capacitance becomes $C_1$. The ratio of $\frac{C_1}{C}$ is

Radius of curved road is ' $R$ ', width of road is ' $b$ '. The outer edge of road is raised by ' $h$ ' with respect to inner edge so that a car with velocity ' $V$ ' can pass safe over it, then value of ' $h$ ' is ( $g =$ acceleration due to gravity)

Two bodies of mass 10 kg and 5 kg are moving in concentric circular orbits of radii ' R ' and ' r ' respectively such that their periods are same. The ratio between their centripetal acceleration is

The figure shows two masses ' $m$ ' and ' $M$ ' connected by a light string that passes through $\text{a}$ small hole ' $O$ ' at the centre of the table. Mass ' $m$ ' is moved round in a horizontal circle with ' $O$ ' as the centre. The frequency with which ' $m$ ' should be revolved so that ' $M$ ' remains stationary is ( $g =$ gravitational acceleration)

In the following circuit, the current through $6\ \Omega$ resistor is

The equivalent resistance of the following circuit when no current flows in the resistance of $5\ \Omega$ is nearly

The energy that should be added to an electron to reduce its de-Broglie wavelength from $\lambda$ to $\frac{\lambda}{2}$ is $n$ times the initial energy. The value of ' $n$ ' is

For two different photosensitive materials having work function $\phi$ and $2\phi$ respectively, are illuminated with light of sufficient energy to emit electrons. If the graph of stopping potential versus frequency is drawn, for these two different photosensitive materials, the ratio of slope of graph for these two materials is

Figure shows the north pole of a magnet moving away from a thick conducting loop containing a capacitor. The excess positive charge will arrive on

When a current in the conducting coil is changed from 5 A in one direction to 5 A in opposite direction in 0.5 second, an average induced e.m.f in the coil is 2 V. The selfinductance of the coil is

Three equal charges are placed on the three corners of a square as shown below. If the magnitude of force between ' $q_1$ ' and ' $q_2$ ' is ' $F_{12}$ ' and that between ' $q_1$ ' and ' $q_3$ ' is $F_{13}$, then the ratio of $F_{13}$ to $F_{12}$ is

The electric field intensity near a conducting surface having uniform surface charge density ' $\sigma$ ' is given by ( $\varepsilon_0 =$ permittivity of free space)

A regular hexagon of side 6 cm has a charge of $2\,\mu\text{C}$ at each of its vertices, what is the potential at the centre of the hexagon?

$\Bigg[\frac{1}{4\pi\varepsilon_0} = 9 \times 10^{9}$ SI unit $\Bigg]$

A wind with speed $50\text{ m/s}$ blows parallel to the roof of a house. The area of the roof is $300\text{ m}^2$. Assume that the pressure inside the house is atmospheric pressure. Density of air is $1.2\text{ kg/m}^3$. The magnitude of the force exerted by the wind on the roof will be

A uniform solid sphere of mass ' $m$ ' and radius ' r ' is surrounded by a uniform thin spherical shell of radius ' $2r$ ' and mass ' $m$ ' then the gravitational field

Two spherical black bodies have radii ' $R_1$ ' and ' $R_2$ '. Their surface temperatures are $T_1 K$ and $T_2 K$ respectively. If they radiate the same power, the ratio $\frac{R_1}{R_2}$ is

The weight of man in a stationary lift is $w_1$ and when it is moving downwards with uniform acceleration ' a ' is $w_2$. If the ratio $w_1 : w_2 = 4 : 3$, then the value of ' a ' is ( $g =$ acceleration due to gravity)

The acceleration (a) - time (T) graph for the body starting from rest is given below. The maximum speed of the body is

Let the current ' $I$ ' be associated with an electron of charge ' $e$ ' moving in a circular orbit of radius ' $r$ ' with speed ' $v$ ' around the positively charged nucleus. The ratio $\frac{r}{v}$ is

The magnetic field at the centre of a current carrying circular coil of area ' $A$ ' is ' $B$ '. The magnetic moment ( M) of the coil is ( $\mu_0 =$ permeability of free space)

A square coil ABCD of side ' L ' is carrying a current in clockwise direction. A straight conductor carrying current $I_2$ (upward direction) is kept parallel to side AB at a distance $\frac{L}{3}$ in the plane of $ABCD$. The net force on the coil ABCD is ( $\mu_0 =$ magnetic permeability)

The activity of radioactive sample is measured as $\text{N}_0$ counts per minute at time $\text{t} = 0$, and $\frac{\text{N}_0}{\text{e}}$ counts per minute at time $\text{t} = 3$ minute, The activity reduces to half its value in time (in minute)

The amplitude of a damped oscillator becomes $\left(\frac{1}{3}\right)^{\text{rd}}$ of original amplitude in 2 seconds. If its amplitude after 6 second become $\left(\frac{1}{n}\right)$ times the original amplitude, the value of $n$ is ( $n$ is non zero integer)

A particle is executing linear S.H.M. starting from mean position. The ratio of the kinetic energy to the potential energy of the particle at a point of half the amplitude is

A ray of light is incident on first face of an equilateral glass prism at an angle of incidence ' $I$ '. The emergent ray just grazes along the adjacent face. The refractive index of the the prism is $\sqrt{2}$. The value of angle of incidence at first face is $\left(\sin 45^\circ = \frac{1}{\sqrt{2}}, \sin 90^\circ = 1\right)$

Let the speed of light and the polarising angle for a given medium be ' $V$ ' and ' $i_p$ ' respectively. The relation between them is: ( $C =$ speed of light in vacuum)

Which of the following statements is TRUE for n-type semiconductor?

In a common emitter transistor amplifier circuit, the current gain $\alpha = 0.8$. If the base current changes by $3\,\mu\text{A}$ then the collector current changes by

In the case of common emitter transistor amplifier, the ratio of collector current to emitter current is 0.96, then the current gain $(\beta)$ of the amplifier is

The excess pressure inside first soap bubble is three times that of a second soap bubble. The ratio of volumes of the first to second bubble

A disc of paper of radius ' $R$ ' has a hole of radius ' $r$ '. It is floating on a liquid of surface tension ' T '. The force of surface tension on the disc is

How much should the pressure be increased in order to reduce the volume of a given mass of gas by $5\%$ at the constant temperature?

The pressure ' P ', volume ' V ' and temperature ' T ' of a gas in a jar ' $A$ ' and the gas in other jar ' $B$ ' is at pressure ' 2 P ', volume ' $\frac{V}{4}$ ' and temperature ' $\frac{T}{4}$ '. Then the ratio of the number of molecules in jar A and jar B will be

Two moles of an ideal monoatomic gas undergo a cyclic process as shown in figure. The temperatures in different states are given as $6\,\mathrm{T}_1 = 3\,\mathrm{T}_2 = 2\,\mathrm{T}_4 = \mathrm{T}_3 = 2400\text{ K}$. The work done by the gas during the complete cycle is ( $\mathrm{R} =$ Universal gas constant)

A polyatomic gas is compressed to $\left(\frac{1}{8}\right)$th of its volume adiabatically. If its initial pressure is $P_0$, its new pressure will be [Given, $\frac{C_p}{C_v} = \frac{4}{3}$ ]

A thermometer bulb has volume $10^{-6}\text{ m}^3$ and cross-section of the stem is $0.002\text{ cm}^2$. The bulb is filled with mercury at $0^\circ\text{C}$. If the thermometer reads temperature as $100^\circ\text{C}$, then the length of mercury column is (coefficient of cubical expansion of mercury $= 18 \times 10^{-5}/^\circ\text{C}$)

Which of the following comes under the category of random errors?

If $\vec{P} = b\hat{i} + 6\hat{j} + \hat{k}$ and $\vec{Q} = \hat{i} - a\hat{j} + 4\hat{k}$ are perpendicular to each other, also $3b - a = 5$. The value of $a$ and $b$ is

Two identical straight wires are stretched so as to produce 6 beats per second when vibrating simultaneously with tensions ' $T_1$ ' and ' $T_2$ ' respectively. On changing the tension slightly in one of them, the beat frequency remains unchanged. This will happen when (Given $\rightarrow T_1 > T_2$)

Two tuning forks when sounded together produce 4 beats per second. One of the forks is in unison with 23 cm length of sonometer wire and other with 24 cm length of the same wire. The frequencies of the two tuning forks are

An observer moves towards a stationary source of sound with a velocity of one fifth of the velocity of sound. The percentage increase in the apparent frequency is

A pipe open at both ends produces a fundamental frequency $n_1$. When the pipe is kept with ${\frac{3}{4}}^{\text{th}}$ of its length in water, it produces a note of fundamental frequency $n_2$. The ratio of $\frac{n_1}{n_2}$ is

A particle performs S.H.M. of amplitude 'A' and wavelength ' $\lambda$ ', Then the velocity of the wave (V) and the maximum particle velocity (v) are related as

Two polaroids are oriented with their planes perpendicular to incident light and transmission axis making an angle $30^\circ$ with each other. What fraction of incident unpolarised light is transmitted? $\left(\cos 30^\circ = \sqrt{3}/2\right)$

In Young's double slit experiment the wavelength of light used is $6000\ \text{Å}$, the screen is 40 cm from the slits and the fringe width is 0.012 cm, the distance between two slits is