List of top Physics Questions asked in MHT CET

A thin circular ring of mass M and radius r is rotating about its axis with a constant angular velocity \(\omega\). Six objects, each of mass m, are kept gently to the opposite ends of three diameters of the ring. The angular velocity of the ring will be

The physical quantity \(P=\frac{a^{3}b^{2}}{c^{1/3}d^{1/4}}\), where the percentage error in a, b, c, and d are \(1\%\), \(\frac{3}{2}\%\), \(3\%\), and \(2\%\) respectively. Then the percentage error in P is

\(\vec{A}\) and \(\vec{B}\) are expressed as \(\vec{A}=2\hat{i}+\hat{j}\) and \(\vec{B}=\hat{i}-\hat{j}\). Unit vector perpendicular to \(\vec{A}\) and \(\vec{B}\) is

In a common emitter amplifier circuit using n-p-n transistor, the phase difference between the input and output voltages will be

The below truth table corresponds to

A	B	Y
0	0	1
1	0	1
0	1	1
1	1	0

The potential barrier in p-n junction diode is due to

At time \(t=0\), the activity of a radioactive substance is \(1600\) Bq. At \(t=8\) s, the activity remains \(100\) Bq. The activity at \(t=2\) s is

Light of frequency \(4\nu _{0}\) is incident on the metal of threshold frequency \(\nu _{0}\). The maximum kinetic energy of the emitted photoelectron is ( h = Planck's constant)

In a diffraction pattern due to a single slit of width a, the first minimum is observed at an angle \(30^{\circ }\) when light of wavelength \(5000\) Å is incident on the slit. The first secondary maximum is observed at an angle of
\(\{\sin (30)^{\circ }=\cos (60)^{\circ }=\frac{1}{2}\}\)

A particle is dropped from a height '\(y\)'. The de-Broglie wavelength of the particle as a function of height is

In Young's double-slit experiment, the intensity at a point is \(\left(\frac{1}{4}\right)\) of the maximum intensity. The angular position of this point is
\(\{\lambda\) = wavelength of light used, d = separation between the two slits, \(\cos (60)^{\circ }=\frac{1}{2}\}\)

Two coherent sources of intensity ratio \(\alpha\) interfere. In interference pattern, \(\frac{I_{max}-I_{min}}{I_{max}+I_{min}}\) is

The potential differences across the resistor, capacitor and inductor are \(80\) V, \(40\) V and \(100\) V respectively in series LCR circuit. The power factor of this circuit is

The angle of minimum deviation produced by a thin prism in air is \(\delta _{1}\). What will be the minimum deviation \((\delta _{2})\) if the prism is immersed in another liquid medium? \(\{{}_{a}n_{g}=3/2,\ {}_{a}n_{l}=4/3\}\)

A very small circular loop of radius 'a' is initially (at \(t=0\)) coplanar and concentric with a much larger fixed circular loop of radius 'b'. A constant current I flows in the larger loop. The smaller loop is rotated with a constant angular speed \(\omega\) about the common diameter. The emf induced in the smaller loop as a function of time t is
(\(\mu _{0}\) = permeability of free space)

If a coil of inductance L and resistance R is connected to AC source with voltage V and angular frequency \(\omega\) and current I, then the inductance L is

In an L-C-R series, AC circuit at resonance,

Which of the following statements is INCORRECT for diamagnetic materials?
a. Relative permeability is less than one.
b. Magnetic susceptibility is negative and low.
c. Magnetic susceptibility does not depend on the temperature.
d. Magnetic susceptibility is positive and low.

A galvanometer having a coil resistance of \(100\ \Omega\) gives a full scale deflection when a current of \(1\) mA is passed through it. The value of the resistance which can convert this galvanometer into ammeter giving a full scale deflection of \(10\) A, is nearly

Which of the following statements is FALSE?
A. In a balanced Wheatstone bridge, if the cell and the galvanometer are exchanged, the null point is disturbed.
B. A rheostat can be used as a potential divider.
C. Kirchhoff's second law represents energy conservation.
D. Wheatstone's bridge is the most sensitive when all the four resistances are of the same order of magnitude.

Two wires of same material A and B, having lengths \(l\) and \(\frac{2l}{3}\) carry the currents \(I\) and \(\frac{3I}{4}\) respectively. Both the wires (A and B) are bent into a circles (of single turn). If \(B_{A}\) and \(B_{B}\) are the values of magnetic field at the centres of the respective circles, then the ratio \(\frac{B_{B}}{B_{A}}\) is

Which of the following statements is NOT TRUE for polar molecule?
a. In polar molecule the centre of mass of positive charges coincide with the centre of mass of negative charges.
b. They have permanent dipole moment.
c. They have asymmetric shape.
d. HCl, \(\text{H}_{2}\text{O}\) are the examples of polar molecules

The walls of the hall built for music concerts should

Three charges each of \(+4\mu \text{C}\) are placed at the corners A, B, C of a square ABCD of side \(1\) m. The electric field at the centre of the square is

The tension in a piano wire is increased by \(25\ \%\). Its frequency becomes "\(nf\)", where f is the original frequency, then, the value of n is nearly