List of top Physics Questions asked in MHT CET

Kirchhoff's current and voltage law are respectively based on the conservation of
A glass tube of $1\text{ m}$ length is filled with water. The water can be drained out slowly from the bottom of the tube. If a vibrating tuning fork of frequency $500\text{ Hz}$ is brought at the upper end of the tube, then the total number of resonances obtained are [Velocity of sound in air is $320\text{ m/s}$]
A bar magnet has length 3 cm, cross-sectional area $2\ \text{cm}^2$ and magnetic moment $3\ \text{A m}^2$. The intensity of magnetisation of the bar magnet is
An electron of mass 'm' and a photon have same energy 'E'. The ratio of de-Broglie wavelength of electron to the wavelength of photon is (c = velocity of light)
If we increase the frequency of an a.c. supply, then inductive reactance
In biprism experiment, the $4^{\text{th}}$ dark band is formed opposite to one of the slits. The wavelength of light used is [d = separation between slits, D = distance between slits and screen]
The magnitude of flux linked with coil varies with time as $\phi = 3t^2 + 4t + 7$. The magnitude of induced e.m.f. at $t = 2\ \text{s}$ is
At what rate a single conductor should cut the magnetic flux so that current of $1.5\ \text{mA}$ flows through it when a resistance of $5\ \Omega$ is connected across its ends?
Two parallel plates with dielectric placed between the plates are as shown in figure. The resultant capacity of capacitor will be [$A = \text{area of plate}$, $t_1, t_2$ and $t_3$ are thickness of dielectric slabs, $k_1, k_2$ and $k_3$ are dielectric constants.]
A charged spherical conductor has radius $r$. The potential difference between its surface and a point at a distance of $3r$ from its centre is $V$. The electric field intensity at a distance of $3r$ from its centre is
The temperature of a black body is increased by 50%, then the percentage increase in the rate of radiation by the body is approximated as
An electron is projected along the axis of a circular conductor carrying current $I$. The electron will experience
A thin ring of radius $R$ meter has charge $q$ coulomb uniformly spread on it. The ring rotates about its axis with a constant frequency of $f\ \text{rev s}^{-1}$. The magnetic induction at the center of the ring is
The fundamental frequency of an air column in pipe 'A' closed at one end coincides with the second overtone of pipe 'B' open at both ends. The ratio of the length of pipe 'A' to that of pipe 'B' is
A particle executing S.H.M. starts from the mean position. Its amplitude is $A$ and time period is $T$. At what displacement is its speed one-fourth of the maximum speed?
Two rods of different metals have coefficients of linear expansion $\alpha_1$ and $\alpha_2$ respectively. Their respective lengths are $L_1$ and $L_2$. If at all temperatures $(L_2 - L_1)$ remains the same, the correct relation is
For a perfectly black body, coefficient of emission is
The energy of an electron in the excited hydrogen atom is $-3.4\ \text{eV}$. Then according to Bohr's theory, the angular momentum of the electron in that excited state is ($h$ = Planck's constant)
In common emitter amplifier, a change of 0.2 mA in the base current causes a change of 5 mA in the collector current. If input resistance is 2 k$\Omega$ and voltage gain is 75, the load resistance used in the circuit is
Which one of the following statements is wrong for an isobaric process?
Figure shows triangular lamina which can rotate about different axes. The moment of inertia is maximum about the axis
When wavelength of incident radiation on the metal surface is reduced from $\lambda_1$ to $\lambda_2$, the kinetic energy of emitted photoelectrons is tripled. The work function of metal [$h$ = Planck's constant, $c$ = velocity of light] is
Work done in increasing the size of a soap bubble from radius of 3 cm to 5 cm in millijoule is nearly (surface tension of soap solution = $0.03\ \text{Nm}^{-1}$)
A student is throwing balls vertically upwards such that he throws the $2^{\text{nd}}$ ball when the $1^{\text{st}}$ ball reaches maximum height. If he throws balls at an interval of 3 second, the maximum height of the balls is ($g = 10\ \text{ms}^{-2}$)
What are the values of the currents flowing in each of the following diode circuits X and Y respectively? (Assume that the diodes are ideal)

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