List of top Physics Questions asked in MHT CET

A simple pendulum of length \( L \) has mass \( M \) and it oscillates freely with amplitude \( A \). At extreme position its potential energy is \( (g = \text{acceleration due to gravity}) \)

In communication with the help of antenna, the range covered (for the line of sight propagation) is initially \(d\). If the height of antenna is doubled, the range covered would become

Seven capacitors each of capacitance $2\,\mu F$ are to be connected to obtain equivalent capacitance of $\dfrac{10{11}\,\mu F$. Which of the following combination is possible?}

A metal sphere of mass \( m \) and density \( \sigma_1 \) falls with terminal velocity through a container containing liquid. The density of liquid is \( \sigma_2 \). The viscous force acting on the sphere is

A block of mass \( M \) is pushed momentarily on a horizontal surface with initial velocity \( V \). If \( \mu \) is the coefficient of sliding friction between the block and surface, the block will come to rest after time \( t \) (where \( g \) is the acceleration due to gravity)

A block of mass $m$, kept on a horizontal surface, is moved through a distance $s$ by applying a horizontal force $F$ to it. What is the work done by the normal reaction?

A circular coil of radius \( R \) has a resistance of 40\( \Omega \). Figure shows two points \( P \) and \( Q \) on the circumference separated by a distance \( \frac{\pi R}{2} \), which are connected to a 16 V battery with internal resistance of 0.5 \( \Omega \). What is the value of current \( I \) flowing through the circuit?

A black rectangular surface of area A emits energy E per second at 27°C. If length and breadth is reduced to \( \frac{1}{3} \) of initial value and temperature is raised to 327°C, then energy emitted per second becomes

A bar magnet has pole strength of 15 A m and magnetic length 1 cm. What is the magnetic induction produced by it at a distance of 50 cm from either pole? (Given: \( \dfrac{\mu_0}{4\pi} = 10^{-7} \, \text{Wb A}^{-1}\text{m}^{-1} \))

Two small drops of mercury each of radius \( R \) coalesce to form a large single drop. The ratio of the total surface energies before and after the change is

In phase modulation, according to the information signal, a parameter of the carrier wave which is varied, is

In an LCR circuit the inductance is changed from \( L \) to \( 9L \). For the same resonant frequency, the capacitance should be changed from \( C \) to

A bullet of mass $20\,\text{g}$ moving with a velocity of $200\,\text{m/s}$ strikes a target and is brought to rest in $\left(\dfrac{1}{50}\right)^{\text{th}}$ of a second. The impulse and average force of impact are respectively

Two masses \( M_1 \) and \( M_2 \) are accelerated uniformly on a frictionless surface as shown in figure. The ratio of the tensions \( \left( \frac{T_1}{T_2} \right) \) is

A stone is tied at the end of a rope of length 1 m and whirled in a vertical circle. The ratio of velocity at the highest point to the lowest point will be

One thousand small water drops of equal radii combine to form a big drop. The ratio of final surface energy to the total initial surface energy 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

How much energy is imparted to an electron so that its de-Broglie wavelength reduces from \( 10^{-10} \) m to \( 0.5 \times 10^{-10} \) m?

A particle executes linear S.H.M. with amplitude 4 cm. The magnitudes of velocity and acceleration are equal when it is 3 cm from the mean position. The time period of motion is

A block of mass \( m \) attached to one end of the vertical spring produces extension \( x \). If the block is pulled and released, the periodic time of oscillation is

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

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 wire of magnetic material of length \( 2L \) and magnetic moment \( M \) is bent at the centre to form 'L' shaped wire. Its magnetic moment is

A potentiometer wire is 4 m long and potential difference of 3 V is maintained between the ends. The e.m.f. of the cell which balances against a length of 100 cm of the potentiometer wire is

Surface density of charge on a charged conducting sphere of radius \( R \) in terms of electric intensity \( E \) at a distance \( r \) in free space is
\textit{(where \( r>R, \, \epsilon_0 \) is permittivity of free space)}