List of top Physics Questions asked in MHT CET

An electron projected in a perpendicular uniform magnetic field of $3 \times 10^{-3} T, $ moves in a circle of radius 4 mm. The linear momentum of electron $(in \, kg-ms^{-1}) $ is
In series L-C-R circuit, the capacitance is changed from C to 2C. The inductance should be changed from L to ... to obtain same resonance frequency.
By keeping moment of inertia of a body constant, if we double the time period, then angular momentum of body
The path difference produced by two waves is 3.75 $\mu$m and the wavelength is 5000 $\mathring {A}$. The point is
The simple pendulum acts as second's pendulum on earth. Its time on a planet, whose mass and diameter are twice that of earth is
The energy stored per unit volume in copper wire, which produces longitudinal strain of 0.1% is $(Y =1.1\times10^3 Nm^{-2})$
Consider a short magnetic dipole of magnetic length 10 cm. Its geometric length is
The binding energy of a satellite of mass m in a orbit of radius r is (R = radius of earth, g = acceleration due to gravity)
Angular velocity of hour hand of a watch is
Two perfect gases at absolute temperatures $T_1$ and $ T_2$ are mixed. There is no loss of energy. The temperature of mixture of masses of molecules are $ m_1$ and $ m_2$ and the number of molecules in the gases are $n_1 $ and $ n_2 $ respectively, is
At constant pressure, which of the following is true ?
Direction of magnetic field at equatorial point is
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 :
Water is flowing through a horizontal pipe in stream line flow. At the narrowest part of the pipe
The iron blade has a ring in which the wooden handle is fixed. The ring is slightly smaller in size than a wooden handle. The ring is heated. When the ring cools, it ______________ and tightly fits on the handle.
A spherical balloon of radius a is charged. The energy density in the electric field at point P shown in the figure given below is W. If the balloon is inflated to a radius b without altering its charge, what is the energy density at P?

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?

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.