List of top Physics Questions asked in MHT CET

In metre bridge experiment, the resistance in the left gap is 15 \(\Omega\) and in the right gap is 45 \(\Omega\). The bridge is balanced. The distance of the null point from the centre of the wire is

A potentiometer wire is 4m long and potential difference of 2V is maintained between the ends. The e.m.f. of the cell which balances against a length of 80 cm of the potentiometer wire is

Two parallel plate air capacitors are connected in parallel. Each capacitor has plate area \(A/2\) and separation between the plates is \(d\) and \(2d\) respectively. The equivalent capacity of the combination is

( \(ε_0\) = absolute permittivity of free space)

An iron rod is placed parallel to magnetic field intensity 1000 A/m. The magnetic flux through the rod is \(3\times 10^{-4}\) Wb and its cross-sectional area is \(1.5 \text{cm}^2\). The magnetic permeability of rod in \(\text{Wb/}_{\text{A-m}}\) is

A charge moves in a circular path perpendicular to a magnetic field. The time period of revolution is independent of

For a uniformly charged plane sheet, the variation of electric field (E) with distance (d) is correctly shown graphically in graph

A point charge 'Q' is placed at the centre of the line joining two equal charges '+q' and '+q'. The value of 'Q' when the system is in equilibrium is

When open pipe is closed from one end then second overtone of closed pipe is higher in frequency by 100 Hz than first overtone of open pipe. The fundamental frequency of open end pipe will be (Neglect end correction)

Capacitors of capacities \(C_1\) and \(C_2\) are connected in series. If the combination is connected to a supply of V volt then the potential difference across capacitor \(C_2\) is

A pipe open at both ends has a fundamental frequency 'f' in air. The pipe is dipped in water, so that \(\frac{2}{3}^{rd}\) length of pipe is in water, Now the fundamental frequency of the air column is

A body of mass \(0.4\) kg performs simple harmonic motion. It experiences a restoring force of \(0.4\) N when its displacement from the mean position is 4 cm. The force constant and magnitude of acceleration respectively are

The minimum phase difference between two simple harmonic motions is
\(x_1 = \frac{1}{\sqrt{2}}sinωt+\frac{1}{\sqrt{2}}cosωt\)
\(x_2 = sinωt+cosωt\)     \([sin\frac{π}{4} = cos\frac{π}{4} = \frac{1}{\sqrt{2}}]\)

A simple harmonic progressive wave is represented by \(y = Asin(120πt+3x)\). The distance between two points on the wave at a phase difference of \(\frac{π}{3}\) radian is

A pendulum clock is running slow, In order to correct it, we should

To increase the frequency of transverse oscillations of a stretched string by 40%, the tension must be increased by

The average translational kinetic energy of a molecule in a gas is \(E_1\). The kinetic energy of the electron (e) accelerated from rest through potential difference 'V' volt is \(E_2\). The temperature at which \(E_1 = E_2\) possible is (N = number of molecules, R = gas constant)

The ratio of the thermal conductivity of two rods of different materials is 6:5. The two rods of same area of cross section and same thermal resistance will have the length in the ratio

An ideal gas is expanded adiabatically. How many times has the gas to be expanded to reduce the r.m.s. speed of molecules 3 times ? (\(γ = 1.5\))

The energy spectrum of a black body exhibits a maximum around a wavelength \(λ\). The temperature of a black body is now changed such that the energy is maximum at wavelength \(2λ/3\). The power radiated by the black body will now increase by a factor of

A black rectangular surface of area A emits energy E per second at \(127^{\circ}\)C. If length and breadth is reduced to half of initial value and temperature is raised to \(527^{\circ}\)C then energy emitted becomes

In a cyclic process, work done by the system is

The distance of the two planets A and B from the sun are '\(r_A\)' and '\(r_B\)' respectively such that \(r_B = 100\,r_A\). The ratio of the speed of planet A to that of planet B is (both the planets are revolving around the sun)

In case of perfectly elastic collision,

Three liquids have same surface tension and densities \(ρ_1\), \(ρ_2\) and \(ρ_3\) (\(ρ_1 < ρ_2 < ρ_3\)). In three identical capillaries rise of liquid is same. The corresponding angle of contact \(θ_1\), \(θ_2\) and \(θ_3\) are related as

A square frame of each side L is dipped in a soap solution and taken out, the force acting on the film formed is ( T = surface tension of soap solution)