List of top Physics Questions asked in MHT CET

If the ratio of amplitudes of two sound waves is \(4:3\), then the ratio of maximum and minimum intensities is

An electron (\( e \)) is revolving in a circular orbit of radius \( r \) in a hydrogen atom. The angular momentum \( M \) of the electron is
\textit{(where \( M \) = magnetic dipole moment associated with it and \( m \) = mass of the electron)}

A metal rod of Young’s modulus $Y$ and coefficient of linear expansion $\alpha$ has its temperature raised by $\Delta \theta$. The linear stress to prevent the expansion of rod is ($L$ and $\ell$ are original length of rod and expansion respectively)

A circular coil of radius \( R \) is carrying a current \( I_1 \) in anticlockwise sense. A long straight wire is carrying current \( I_2 \) in the negative direction of x-axis. Both are placed in the same plane and the distance between the centre of coil and straight wire is \( d \). The magnetic field at the centre of coil will be zero for the value of \( d \) equal to

In a semiconductor, the number of holes and number of free electrons are represented as \( n_h \) and \( n_e \), respectively. Which one of the following statements is TRUE for the semiconductor?

When a beam of unpolarised monochromatic light is incident on a plane glass plate at a polarising angle, which one of the following statements is correct?

The angle made by a vector \( \vec{B} = 3\hat{i} + 2\hat{j} + 4\hat{k} \) with the y-axis is

The increase in length of a wire on stretching is \(0.05%\). If its Poisson’s ratio is 0.4, then its diameter is reduced by

A capacitor is charged by a battery and energy stored is $U$. Now the battery is removed and the distance between plates is increased to four times. The energy stored becomes

If the frequency of incident light falling on a metallic surface is doubled, maximum kinetic energy of emitted photoelectrons

Moment of inertia of a solid sphere about its diameter is $I$. It is then cast into $27$ small spheres of same diameter. The moment of inertia of each new sphere is

Energy of the incident photon on the metal surface is ' 3W ' and then ' 5W ', where 'W' is the work function for that metal. The ratio of velocities of emitted photoelectrons is

A torque of 50 Nm acts on a body for 8 seconds which is initially at rest. The change in its angular momentum is

A body of mass \(m\) is moving along a circle of radius \(r\) with linear speed \(v\). Now, to change the linear speed to \(\dfrac{v}{2}\) and to move it along the circle of radius \(4r\), required change in the centripetal force of the body is

The non-zero potential difference across diode \(D_1\) and that across diode \(D_2\) are equal in the circuit shown in the figure (both diodes are identical in characteristics)

If the kinetic energy of a particle is increased to 16 times its previous value, the percentage change in the de-Broglie wavelength of the particle is

One mole of a diatomic gas does a work $\frac{Q{3}$, when the amount of heat supplied is $Q$. In this process, the molar heat capacity of the gas is}

Binding energy of a revolving satellite at height \(h\) is \(3.5\times10^8\,\text{J}\). Its potential energy is

Choose the correct statement. In conductors

An iron rod is placed parallel to the magnetic field of intensity 2000 \( A/m \). The magnetic flux through the rod is \( 6 \times 10^{-4} \, Wb \) and its cross-sectional area is \( 3 \, cm^2 \). The magnetic permeability of the rod in \( \frac{Wb}{A \cdot m} \) is

In the equation \( P = \frac{C+S}{D} \), \( P \) and \( S \) represent pressure and distance respectively. The dimensions of \( \frac{P}{D} \) are

The motion of a rocket in upward direction with high speed is based on the principle of conservation of

A metal sphere of radius 1 m is charged with \( 10^{-2} \) C in air. Its bulk modulus is \( \frac{10^{11}}{4\pi^2} \). The volume strain in the sphere is \( \epsilon_0 \) (permittivity of free space)

The 3rd overtone of a closed organ pipe is in unison with 3rd overtone of an open pipe. The ratio of the length of the closed pipe to the length of open pipe is

A progressive wave of frequency \( 50\,\text{Hz} \) is travelling with velocity \( 350\,\text{m s}^{-1} \) through a medium. The change in phase at a given point in a time interval of \( 0.01\,\text{s} \) is