List of top Physics Questions asked in MHT CET

A satellite of mass ' m ' is orbiting the earth of radius ' R ' at height ' h ' from the surface of earth. The total energy of the satellite is ( g = acceleration due to gravity at the earth's surface)

A circular coil carrying current ' I ' has radius ' R ' and magnetic field at the centre is ' B '. At what distance from the centre along the axis of the same coil, the magnetic field will be \( \frac{B}{8} \) ?

The wrong statement out of the following statements is

The potentials at points A and B are \( V_A \) and \( V_B \) respectively for the charges \( +q \) and \( -q \) placed at distances ' x ' each from points A and B as shown in figure. The distance between points A and B is ' y '. The net potential (\( V_A - V_B \)) is proportional to

A galvanometer of resistance ' G ' is converted into an ammeter of resistance \( \frac{G}{40} \), by connecting a shunt ' S ' to it. The part of main current passing through the galvanometer is

Rate of flow of heat through a cylindrical rod is \( H_1 \). The temperature of the ends of the rod are ' \( T_1 \) ' and ' \( T_2 \) '. If all the dimensions of the rod become double and the temperature difference remains the same, the rate of flow of heat becomes ' \( H_2 \) '. Then \( H_2 = \)

An alternating current is given by $I = 100 \sin(50\pi t)$. How many times will the current become zero in one second?

For which of the following combinations of working temperatures, the efficiency of Carnot's engine is maximum?

A coil of area \( 12 \text{ cm}^2 \) has \( 250 \) turns. Magnetic field of \( 0.2 \text{ Wb/m}^2 \) is perpendicular to the plane of the coil. The field is reduced to \( 0.1 \text{ Wb/m}^2 \) in \( 0.1 \text{ second} \). The magnitude of induced e.m.f. in the coil is

A particle starts from mean position and performs S.H.M. with period 6 second. At what time its kinetic energy is $50\%$ of total energy? \( (\cos 45^\circ = \frac{1}{\sqrt{2}}) \)

Which one of the following statements is false for a particle moving in a circle with constant angular speed?

In the following figure, the current \( I \) is equal to

To get an output Y = 1 in the given logic circuit, the correct choice for the input is

A simple harmonic progressive wave is given by equation \( y = a \sin 2\pi (nt - \frac{x}{\lambda}) \). If the wave velocity is equal to \( \frac{1}{4} \times \) (maximum particle velocity), then the wavelength ' \( \lambda \) ' is (Given \( a = \) amplitude, \( n = \) frequency, \( t = \) time, \( y = \) displacement, \( x = \) distance )

A magnet having a magnetic dipole moment ' M is placed in two magnetic fields ' \( B_1 \) ' and ' \( B_2 \) ' respectively. If it is displaced slightly from the equilibrium position, it oscillates $60$ times in $20$ second in field ' \( B_1 \) ' and $60$ times in $30$ second in field ' \( B_2 \) '. The ratio of field ' \( B_1 \) ' to that of ' \( B_2 \) ' is

Two objects A and B are separated horizontally by distance ' a '. Object B moves in a direction perpendicular to distance ' a ' with velocity ' \( V_1 \) '. Simultaneously object A covers shortest distance with velocity ' V ' and meets object B in time ' t '. The time ' t ' is given by

The magnitude of magnetic induction at a point on the axis at a large distance ' \( r \) ' from the centre of a circular coil of ' \( n \) ' turns and area ' \( A \) ' carrying current ' I ' is (\( \mu_0 = \) permeability of free space)

A thin concavo-convex lens with convex face receiving incident rays has radii of curvatures \( 12 \text{ cm} \) and \( 24 \text{ cm} \) respectively. If refractive index of material of lens is \( 1.5 \), then the focal length of the lens is

A large insulated sphere of radius ' r ', charged with ' Q ' units of electricity, is placed in contact with a small insulated uncharged sphere of radius ' R ' and is then separated. The charge on the smaller sphere will now be

In the series LCR circuit shown in figure, the impedance is

An ideal gas is heated from \( 27^\circ\text{C} \) to \( 627^\circ\text{C} \) at constant pressure. If initial volume of gas is \( 4 \text{ m}^3 \), then the final volume of the gas will be

The flux linked with the coil at any instant ' t ' is given by \( \phi = 12t^2 - 60t + 275 \). The magnitude of induced e.m.f. at \( t = 3 \text{ second} \) is

An ideal gas of mass \( M \) in the state \( A \) goes to another state \( B \) via three different processes. If \( Q_1, Q_2 \) and \( Q_3 \) denote the heat absorbed by the gas along the paths 1, 2 and 3 respectively, then

In Young's double slit experiment, fringe width is \( 1.4 \text{ mm} \) with light of wavelength \( 6000\,\text{\AA} \). If the light of wavelength \( 5400\,\text{\AA} \) is used, with no other change in the experimental set up. The change in fringe width is