List of top Physics Questions asked in MHT CET

A bob of a simple pendulum of mass $m$ is displaced through $90^\circ$ from its mean position and released. When the bob is at its lowest position, the tension in the string is

In a Wheatstone's bridge, three resistances $P$, $Q$ and $R$ are connected in the three arms and the fourth arm is formed by two resistances $S_1$ and $S_2$ connected in parallel. The condition for the bridge to be balanced is

The critical angle for light going from medium A into medium B is $\theta$. The speed of light in medium A is $V_A$. What is the speed of light in medium B?

A sonometer wire resonates with a given tuning fork forming standing waves with five antinodes between the two bridges when a mass of $9\ \text{kg}$ is suspended from the wire. When this mass is replaced by a mass $M$, the wire resonates with the same tuning fork forming three antinodes for the same positions of the bridges. The value of '$M$' is

Water rises in a capillary tube of radius $r$ up to a height $h$. The mass of water in the capillary is $m$. The mass of water that will rise in a capillary tube of radius $\frac{r}{3}$ will be

If a current flowing in a coil is reduced to half of its initial value, the relation between the new energy ($E_2$) and the original energy ($E_1$) stored in the coil will be

If the temperature of the sun is doubled, the rate of energy received by the earth will be increased by a factor

In an a.c. circuit, a resistance $R = 40\ \Omega$ and an inductance '$L$' are connected in series. If the phase angle between voltage and current is $45^\circ$, then the value of the inductive reactance is ($\tan 45^\circ = 1$)

A pipe open at both ends of length $1.5\ \text{m}$ is dipped in water such that the second overtone of vibrating air column is resonating with a tuning fork of frequency $330\ \text{Hz}$. If speed of sound in air is $330\ \text{m/s}$, then the length of the pipe immersed in water is (Neglect end correction)

Choose the FALSE statement from the following.

The mass of a planet is six times that of the earth. The radius of the planet is twice that of the earth. If the escape velocity from the earth is '$V_e$', then the escape velocity from the planet is

A biconvex lens ($R_1 = R_2 = 30\ \text{cm}$) has focal length equal to the focal length of a concave mirror. The radius of curvature of the concave mirror is [Refractive index of material of lens $= 1.6$]

A mass $0.4\ \text{kg}$ performs S.H.M. with a frequency $\frac{16}{\pi}\ \text{Hz}$. At a certain displacement it has kinetic energy $2\ \text{J}$ and potential energy $1.2\ \text{J}$. The amplitude of oscillation is

A wire of length $1\ \text{m}$ is moving at a speed of $2\ \text{m/s}$ perpendicular to a homogeneous magnetic field of $0.5\ \text{T}$. If the ends of the wire are joined to a resistance of $6\ \Omega$, the rate at which work is being done to keep the wire moving at that speed is

The translational kinetic energy of the molecules of a gas at absolute temperature ($T$) can be doubled

In Young's double slit experiment, the $10^{\text{th}}$ maximum of wavelength '$\lambda_1$' is at a distance of '$Y_1$' from the central maximum. When the wavelength of the source is changed to '$\lambda_2$', the $5^{\text{th}}$ maximum is at a distance '$Y_2$' from the central maximum. The ratio $\frac{Y_1}{Y_2}$ is

A polyatomic gas ($\gamma = 4/3$) is compressed to $\left(\frac{1}{8}\right)^{\text{th}}$ of its volume adiabatically. If its initial pressure is $P_0$, its new pressure will be

If $\omega_1$ is the angular velocity of the hour hand of a clock and $\omega_2$ is the angular velocity of the earth's rotation about its axis, then the ratio $\omega_1 : \omega_2$ is

A sound wave is travelling with a frequency of $50\ \text{Hz}$. The phase difference between the two points in the path of a wave is $\frac{\pi}{3}$. The distance between those two points is (Velocity of sound in air $= 330\ \text{m/s}$)

A transverse wave given by $y = 2 \sin(0.01x + 30t)$ moves on a stretched string from one end to another end in $0.5\ \text{second}$. If '$x$' and '$y$' are in $\text{cm}$ and '$t$' is in $\text{second}$, then the length of the string is

A circular coil of radius $R$ has $N$ turns of a wire. The coefficient of self-induction of the coil will be ($\mu_0 = $ permeability of free space)

Two rotating bodies $P$ and $Q$ of masses $m$ and $2m$ with moment of inertia $I_P$ and $I_Q$ ($I_Q > I_P$) have equal Kinetic energy of rotation. If $L_P$ and $L_Q$ be their angular momenta respectively, then

A logic gate which gives output 'HIGH' only when its two input terminals are at different logic levels with respect to each other is

An a.c. source of angular frequency $\omega$ is fed across a resistor $R$ and a capacitor $C$ in series. The current registered is $I$. If now the frequency of source is changed to $\frac{\omega}{3}$ (but maintaining the same voltage), the current in the circuit is found to be halved. The ratio of reactance to resistance at the original frequency $\omega$ will be

A step-down transformer has a turns ratio of $20 : 1$. If $8\text{ V}$ is applied across a $0.4\ \Omega$ secondary load, then the primary current will be