List of top Physics Questions asked in MHT CET

In an LCR series circuit an alternating voltage source of frequency \(F\) is connected. The current leads the voltage by \(45^{\circ}\). The value of \(L\) is

A circular arc of wire of radius of curvature \(r\) subtends an angle of \(\frac{π}{5}\) radian at its centre. If current \(i\) is flowing in it then the magnetic induction at its centre is (\(μ_0\) = permeability of free space)

An aeroplane having a wing span of 30 m flies due north with the speed of 170 m/s. Magnetic field \(B = 3.6\times 10^{-5}\) T. The potential difference between the tips of the wings will be

Two point charges placed in air separated by distance \(R\) exert a force \(F\) on each other. Now the space between those charges is filled with dielectric constant \(K\). At distance \(R_1\) between the charges, the same force is exerted as \(F\). Then

An electron is moving with initial velocity \(\overset{⃗}{v} = V_0\hat{j}\) in a magnetic field \(\overset{⃗}{B} = B_0\hat{i}\). Its de-Broglie wavelength will

Figure shows a potentiometer wire AB having resistance of \(5 \Omega\) and length 10 m. An e.m.f. is \(0.4\) V of battery, the balancing length AP is (internal resistance is negligible)

The currents in different parts of the electric circuit are shown in following figure. The value of current \(i\) is

A charge \(Q\) is placed at each corner of a cube of side \(r\). The potential at the centre of the cube is (\(ε_0\) = permittivity of free space)

Select the 'WRONG' statement about polar molecules.

Two waves are represented as
\(y_1 = a_1sin(ωt-\frac{2πx}{λ})\) and
\(y_2 = a_2cos(ωt-\frac{2πx}{λ}+\frac{π}{6})\)
The path difference between two waves is

A particle is performing S.H.M. about \(x = 0\), with an amplitude \(a\) and time period \(T\). The speed of the particle at \(x = \frac{a}{3}\) will be

If charge \(+q\) is taken from one point to another over an equipotential surface, then

Two sound waves each of wavelength \(λ\) and same amplitude \(A\) interfere at point \(Q\). If the path difference is \(\frac{λ}{4}\), the amplitude of the resultant wave at point \(Q\) is \([sin\frac{π}{2} = 1,cos\frac{π}{2} = 0]\)

The equation of a wave on a string of linear mass density \(0.02 \text{kg m}^{-1}\) is \(Y = 0.01sin[2π(\frac{t}{0.02}-\frac{x}{0.50})]\) m. The tension in the string is

Two monoatomic ideal gases '1' and '2' of molecular masses \(m_1\) and \(m_2\) respectively are enclosed in separate containers kept at the same temperature. The ratio of the speed of sound in gas '1' to that in gas '2' is

For a particle executing S.H.M., the potential energy is \(n\) times the kinetic energy when its displacement from mean position is \((\frac{2\sqrt{2}}{3})A\), where \(A\) is the amplitude of S.H.M. The value of \(n\) is

The displacement of a particle varies with time according to the relation
\(x = asinωt+bcosωt\)

A black body is at temperature of 5780 K. The energy of radiation emitted by the body at wavelength 300 nm is \(U_1\), at wavelength 500 nm is \(U_2\) and that at 900 nm is \(U_3\) respectively. Wien's constant \(b = 2.89\times 10^6 \text{nmK}\). This shows that

A sphere having temperature 600 K is losing heat due to radiation. At this temperature its rate of cooling is \(R\). The rate of cooling of this sphere at 400 K is \(\frac{x}{243}\). The value of \(x\) is (Temperature of surrounding is 300 K)

An ideal gas having pressure \(P\), volume \(V\) and temperature \(T\) is expanded isothermally, to a volume \(3V\) and final pressure \(P_I\). The same gas is expanded adiabatically to a volume \(3V\), the final pressure being \(P_A\). The ratio \(\frac{P_A}{P_I}\) is \((\frac{C_P}{C_V} = γ)\)

A piece of metal of 850 K is dropped into 1 kg of water at 300 K. If equilibrium temperature of water is 350 K then the heat capacity of the metal expressed in \(\frac{J}{K}\) is \((\text{Sp. heat of water} = 1 \frac{\text{cal}}{\text{g}^{\circ}\text{C}})\)

The efficiency of Carnot engine which operates between the two temperatures \(T_1 = 500\) K and \(T_2 = 300\) K is

A solid sphere of mass 5 kg and a disc of mass 4 kg have the same radius. The ratio of moment of inertia of the sphere about its tangent to the moment of inertia of the disc about a tangent in its plane will be \(x:y\). The value of \(x\) and \(y\) respectively is

Two stars A and B radiate maximum energy at wavelength \(3.9\times 10^{-7}\) m and \(5.2\times 10^{-7}\) m respectively. The ratio of the temperature of star A to that of star B will be

Select the correct statement out of the following