List of top Questions asked in MHT CET

Which of the following gases has the maximum number of molecules?
What is the energy of an electron in a hydrogen atom whose angular momentum is \(h/\pi\) ?
In case of thermistor, which one of the following statements is 'WRONG'?
Light of incident frequency three times the threshold frequency is incident on a photo sensitive material. If the incident frequency is made \(\left(\frac{1}{3}\right)^{rd}\) and intensity is doubled then photoelectric current will
Which one of the following spectral series of hydrogen atom lies in ultraviolet region?
Which one of the following is possible nuclear reaction?
The wavelength '\(\lambda\)' of photon and the de-Broglie wavelength of an electron have same value. The ratio of kinetic energy of electron to the energy of a photon is (m=mass of electron, h = Planck's constant, c = velocity of light)
The relation between magnetic moment (M) of revolving electron of charge (e) and mass (m) having principle quantum number (n) is (h = Planck's constant)
The focal length of a glass convex lens in air is \(f_{a}\) and that in water is \(f_{w}\). The refractive index from air to glass is \(\frac{3}{2}\) and that from air to water is \(\frac{4}{3}\). The ratio \(f_{a}:f_{w}\) is
A resistor of \(200\Omega\), an inductor of self inductance \(\left(\frac{2}{\pi ^{2}}\right)\) H and a capacitor of unknown capacity are connected in series to an a.c. source of \(100\) V and \(50\) Hz. When the current and voltage are in phase the capacitance and the power dissipated is
A beam of light is travelling from region I to region IV. The refractive indices in regions I, II, III and IV are \(n\), \(\frac{n}{2}\), \(\frac{n}{3}\) and \(\frac{n}{4}\) respectively. The angle of incidence for which the beam just misses entering region IV is [\(\sin 90^{\circ }=1\)]

In the Young's double slit experiment, when a glass plate of thickness 't' is introduced in the path of one of the slits, the intensity at the position where the central maximum occurred previously remains unchanged. The minimum thickness of glass plate is [refractive index of glass plate = 1.5, wavelength of light in vacuum is \(\lambda\)]
The interference pattern is obtained with two coherent light sources of intensity (\(I_{1}\) and \(I_{2}\)) ratio '\(\beta\)'. In the interference pattern, the ratio \(\left(\frac{I_{max}+I_{min}}{I_{max}-I_{min}}\right)\) will be \(\left(\beta =\frac{I_{2}}{I_{1}}\right)\)
The correct phasor diagram for an a.c. circuit containing only pure capacitor.

A bar magnet falls from a height through a metal pipe. Its acceleration will be (\(g\) = acceleration due to gravity)
A long metal rod of length 'L' completes the circuit. The area of the coil is perpendicular to magnetic field 'B'. Total resistance of the circuit is 'R'. The force needed to move the rod in the direction as shown with constant speed 'V' is

A coil having effective area 'A' is held with its plane normal to a magnetic field of induction 'B'. The magnetic induction is quickly reduced to \(25\%\) of its initial value in \(2\) second. Then e.m.f. induced across the coil will be
A rectangular coil of \(n\) turns has area \(\vec{A}\) and it is placed in uniform magnetic field \(\vec{B}\). If the current passing through the coil is 'I' then the torque acting on the coil is
The current flowing through an inductor of self-inductance L is continuously increasing at constant rate. The variation of induced e.m.f. (e) versus time \(t\) is shown graphically by
A circular coil having n turns, each of radius 'r' carries a current I. The magnetic field at a distance \(x=\sqrt{8}r\) from its centre along the axis of the coil is (\(\mu _{0}\) = permeability of free space)
Polar molecules are those in which
A voltmeter with series resistance \(R\) has a range \((0-V_{1})\) volt. With a series resistance of \(4R\), its range becomes \((0-V_{2})\) volt. The relation between \(V_{1}\) and \(V_{2}\) is
Air capacitor has capacitance \(C_{1}\). The space between two plates of capacitor is filled with two dielectric as shown in figure. The new capacitance of the capacitor is \(C_{2}\). Then \(\frac{C_{1}}{C_{2}}\) is [\(d\) = distance between two plates, \(K_{1}\) and \(K_{2}\) are dielectric constants of first and second dielectrics respectively]

Three equal \((+q)\) charges are placed in air at the vertices of equilateral triangle. If the side of equilateral triangle is \(l\), the net potential energy of the system is \(\left[K=\frac{1}{4\pi \epsilon _{0}}\right]\)
A balanced meter bridge is shown in the circuit diagram. The meter bridge wire has resistance \(2\frac{\Omega }{cm}\). The current drawn from the battery is (Internal resistance of the battery is negligible)