List of top Physics Questions asked in MHT CET

Two small drops of mercury, each of radius $R$, coalesce to form a single large drop. The ratio of the total surface energies before and after the change is
In moving coil galvanometer, strong horse shoe magnet of concave shaped pole pieces is used to
A galvanometer has resistance of $100\, \Omega$ and a current of $10 \,mA$ produces full scale deflection in it. The resistance to be connected in series, to get a voltmeter of range $50$ volt is
If $'C_p'$ and $'C_v'$ are molar specific heats of an ideal gas at constant pressure and volume respectively. If $'\lambda'$ is the ratio of two specific heats and $'R'$ is universal gas constant then $'C_p'$ is equal to
A uniform rod of length $'6L'$ and mass $'8 \,m'$ is pivoted at its centre $'C'$. Two masses $'m'$ and $'2m'$ with speed $2v$, $v$ as shown strikes the rod and stick to the rod. Initially the rod is at rest. Due to impact, if it rotates with angular velocity $'\omega'$ then $'\omega'$ will be
The magnifying power of a telescope is nine. When it is adjusted for parallel rays, the distance between the objective and eyepiece is $20 \,cm$. The focal length of objective and eyepiece are respectively
If $W_1$, $W_2$ and $W_3$ represent the work done in moving a particle from $A$ to $B$ along three different paths $1$, $2$ and $3$ (as shown in fig) in the gravitational field of the point mass $'m'$. Find the correct relation between $'W'_1$, $'W_2'$ and $'W_3'$
A pipe open at both ends and a pipe closed at one end have same length. The ratio of frequencies of their $P^{th}$ overtone is
A particle executes the simple harmonic motion with an amplitude $'A'$. The distance travelled by it in one periodic time is
A thin metal wire of length $'L'$ and uniform linear mass density $'\rho'$ is bent into a circular coil with $'O'$ as centre. The moment of inertia of a coil about the axis $XX'$ is
For a transistor, the current ratio $'\beta'_{dc}$ is defined as the ratio of
If $\sqrt{A^{2}+B^{2}}$ represents the magnitude of resultant of two vectors $(A + B)$ and $(A - B)$, then the angle between two vectors is
Bohr model is applied to a particle of mass $'m'$ and charge $'q'$ is moving in a plane under the influence of a transverse magnetic field $'B'$. The energy of the charged particle in the $nth$ level will be ($h =$ Planck's constant)
In a hydrogen atom, an electron of charge e revolves in a orbit of radius $r$ with speed $v$. Then, magnetic moment associated with electron is
$V$-$I$ characterstics of $LED$ is shown correctly by graph
The dimensions of torque are same as that of
The $SI$ unit and dimensions of Stefan?s constant $\sigma$ in case of Stefan?s law of radiation is
In a fundamental mode, the time required for the sound wave to reach upto the closed end of a pipe filled with air is $'t'$ second. The frequency of vibration of air column is
If $M_z$ = magnetization of a paramagnetic sample, $B$ = external magnetic field, $T$ = absolute temperature, $C$ = curie constant then according to Curie�s law in magnetism, the correct relation is
The path length of oscillation of simple pendulum of length 1 metre is 16 cm. Its maximum velocity is $(g = \pi^2 \, m/s^2)$
An ideal transformer converts $220\, V$ a.c. to $3.3\, kV$ a.c. to transmit a power of $4.4\, kW$. If primary coil has $600$ turns, then alternating current in secondary coil is
A ray of light is incident normally on a glass slab of thickness $5\, cm$ and refractive index 1.6. The time taken to travel by a ray from source to surface of slab is same as to travel through glass slab. The distance of source from the surface is
In non uniform circular motion, the ratio of tangential to radial acceleration is (r = radius of circle, $v =$ speed of the particle, $\alpha =$ angular acceleration)
A vessel completely filled with water has holes 'A' and 'B' at depths 'h' and '3h' from the top respectively. Hole 'A' is a square of side 'L' and 'B' is circle of radius 'r'. The water flowing out per second from both the holes is same. Then 'L' is equal to
A transistor is used as a common emitter amplifier with a load resistance 2 K$\Omega$. the input resistance is 150 $\Omega$. Base current is changed by 20 $\mu$A which results in a change in collector current by $1.5\, mA$. The voltage gain of the amplifier is