List of top Physics Questions asked in MHT CET

The displacement of a particle performing simple harmonic motion is given by, x=8sin$\omega t+6cos \omega t$, where distance is in cm and time is in second. The amplitude of motion is

The minimum phase difference between two simple harmonic oscillations, $ \, \, \, \, \, \, \, \, y_1 =\frac{1}{2}sin \omega t +\frac{\sqrt 3}{2} cos \omega t$ $ \, \, \, \, \, \, \, \, \, \, \, y_2 =sin \omega t +cos \omega t$ is

Two light rays having the same wavelength $\lambda$ in vacuum are in phase initially. Then the first ray travels a path $L_1$ through a medium of refractive index $n_1$ while the second ray travels a path of length $L_2$ through a medium of refractive index $n_2$. The two waves are then combined to produce interference. The phase difference between the two waves is

Turning effect is produced by

A thick wire is stretched, so that its length become two times. Assuming that there is no change in its density, then what is the ratio of change in resistance of wire to the initial resistance of wire?

In Melde's experiment, the string vibrates in 4 loops when a 50 g weight is placed in the pan of weight 15 g. To make the strings to vibrates in 6iJoops the weight that has to be removed from the pan is

The time period of a particle in simple harmonic motion is 8 second. At t = 0 it is at the mean position. The ratio of the distances travelled by it in the first and second seconds is:

A galvanometer of 100 $ \Omega $ resistance gives full scale deflection with 0.01 A current. How much resistance should be connected to convert it into an ammeter of range , 10 A :

A beam of unpolarized light is incident on a polarizer. The intensity of the transmitted light is measured as it passes through the polarizer. If the angle between the light's initial direction and the axis of the polarizer is $ \theta $, what is the intensity of the transmitted light? The intensity of the transmitted light is given by Malus' law: \[ I = I_0 \cos^2 \theta \]
where:
$ I_0 $ is the intensity of the unpolarized light before passing through the polarizer,
$ \theta $ is the angle between the light's initial direction and the axis of the polarizer.

In a parallel bridge circuit involving capacitors, the circuit's resultant capacitance is to be determined. If the capacitance values are given, calculate the resultant capacitance in the parallel combination. Assume the capacitors have the following capacitance values:
$ C_1 = 2 \, \mu\text{F} $
$ C_2 = 3 \, \mu\text{F} $
$ C_3 = 4 \, \mu\text{F} $

The capacitors are connected in parallel.

A body is floating in oil. The density of the oil is $ \rho_{\text{oil}} $ and the density of the body is $ \rho_{\text{body}} $. If the body is partially submerged, what is the fraction of the body's volume submerged in the oil?
Given:
$ \rho_{\text{oil}} $ = density of the oil,
$ \rho_{\text{body}} $ = density of the body.

Which of the following logic gates produces a LOW output when a HIGH input is applied?

Three springs having spring constants $ k $, $ 2k $, and $ 3k $ are connected (i) in series and (ii) in parallel. Let the effective spring constants for the series and parallel combinations be $ k_s $ and $ k_p $ respectively. What is the ratio $ \frac{k_p}{k_s} $?

A sonometer wire gives frequency $ f_1 $ with tension $ T_1 $. If the tension is made 4 times greater, what is the new frequency? The frequency of a vibrating wire is related to the tension in the wire by the equation: \[ f \propto \sqrt{T} \] where:
$ f $ is the frequency,
$ T $ is the tension in the wire.

If the tension is increased by a factor of 4, how does the frequency change?

Which of the following compounds has the highest thermal stability?

A magnetic field is produced along the axis of a current-carrying loop. The direction and magnitude of the magnetic field at the center of the loop can be determined using the Biot-Savart law. What will be the direction of the magnetic field along the axis of the current loop? The magnetic field produced along the axis of a circular current loop is given by the equation: \[ B = \frac{{\mu_0 I R^2}}{{2 (R^2 + x^2)^{3/2}}} \]
where:
$ B $ is the magnetic field,
$ \mu_0 $ is the permeability of free space,
$ I $ is the current,
$ R $ is the radius of the loop,
$ x $ is the distance from the center of the loop along the axis.

In a photoelectric effect experiment, light of wavelength $ \lambda $, $ \lambda/2 $, and $ \lambda/6 $ are incident on a metal surface. The stopping potential for these wavelengths are given as $ V_1 $, $ V_2 $, and $ V_3 $, respectively. If the work function of the metal is $ \phi $, calculate the work function using the given wavelengths. The photoelectric equation is given by: \[ E_k = h \nu - \phi \] where:
$ E_k $ is the kinetic energy of the emitted electrons (which is related to the stopping potential),
$ h $ is Planck's constant,
$ \nu $ is the frequency of the incident light,
$ \phi $ is the work function of the metal.

The frequency $ \nu $ is related to the wavelength $ \lambda $ by the equation: \[ \nu = \frac{c}{\lambda} \] where $ c $ is the speed of light.

A spherical object of radius $ R $ is placed in a uniform electric field $ E $. If the dielectric constant of the material of the object is $ K $, find the induced charge on the surface of the object.

In a p-n junction diode, if the forward bias voltage is increased, how does the current flowing through the diode change?

A body oscillates with simple harmonic motion with an amplitude of 2 cm and a period of 4 seconds. What is the maximum speed of the body?

A magnetic field of strength $ B = 2 \, \text{T} $ is applied perpendicular to a current-carrying conductor. If the current in the conductor is $ I = 3 \, \text{A} $ and the length of the conductor within the magnetic field is $ L = 1.5 \, \text{m} $, calculate the force acting on the conductor.