List of top Questions asked in MHT CET

What is the shape of \(\text{ClF}_{3}\) according to VSEPR theory ?

Calculate the number of molecules in \(2\) mol of MgO.

Using Bohr's quantisation condition, what is the rotational kinetic energy in the second orbit for a diatomic molecule (I = moment of inertia of diatomic molecule, h = Planck's constant)

The frequency of the incident light falling on a photosensitive metal plate is doubled, the kinetic energy of the emitted photoelectrons is

In common emitter amplifier, using output resistance \(5000\) \(\Omega\) and input resistance \(2000\) \(\Omega\), if the peak value of input signal voltage is \(10\) mV and \(\beta =50\), then peak value of output voltage is

A parallel beam of light is incident normally on a plane surface absorbing \(40\%\) of light and reflecting the rest. If the incident beam carries \(60\) W of power the force exerted by it on the surface is (C = velocity of light = \(3\times 10^{8}\) m/s )

The ratio of minimum wavelengths of Lyman and Balmer series will be

The wavelength of light used in Young's double slit experiment, is \(\lambda\). The intensity at a point on the screen is I, where the path difference is \(\frac{\lambda }{6}\). If \(I_{0}\) is the maximum intensity then the ratio I to \(I_{0}\) is \(\left(\cos 30^{\circ }=\frac{\sqrt{3}}{2}\right)\)

In an LCR series circuit, a. c. voltage source is connected in series. When L is removed from the circuit, the phase difference between the voltage and the current is \(\pi /3\). If instead C is removed, the phase difference is again \(\pi /3\). The power factor of the circuit is \(\left(\tan \frac{\pi }{3}=\sqrt{3}\right)\)

The ratio of intensity at the centre of a bright fringe to the intensity at a point distant \(\left(\frac{1}{4}\right)^{th}\) of the distance between two successive bright fringes will be \((\cos 0^{\circ }=1,\,\cos 90^{\circ }=0)\)

A transformer having efficiency \(90\%\) is working on \(200\) V and \(3\) KW power supply. If the current in the secondary coil is \(6\)A, the voltage across the secondary coil and the current in the primary coil, respectively, are

In Young's double slit experiment, the slit width is \(1\) mm and screen is at a distance \(2\) m from slits. Light of \(600\) nm is used. If a thin glass plate of refractive index \(1.5\) of thickness \(0.06\) mm is placed over one of the slits then there will be a lateral displacement of the fringes by

Three immiscible transparent liquids with refractive indices \(\frac{3}{2}\), \(\frac{4}{3}\) and \(\frac{6}{5}\) are arranged one above the other. The depths of the liquids are 3 cm, 4 cm and 6 cm respectively. The apparent depth of the vessel is

What is the value of inductance L for which the current is maximum in series LCR circuit with \(C=10\) \(\mu\)F and \(\omega =1000\)/s ?

For series LCR circuit, the current is observed to lead the applied voltage. An additional capacitor \(C_{1}\) when joined with capacitor C, makes the power factor of the circuit unity. The capacitor \(C_{1}\) must be connected in

A circular ring of diameter \(20\) cm has a resistance of \(0.01\) \(\Omega\). The charge that will flow through the ring, if it is turned from a position perpendicular to a uniform magnetic field of \(2\)T to a position parallel to the field is (in coulomb) (\(\because \cos 0^{\circ }=1\), \(\cos 90^{\circ }=0\))

An air cored coil has a self inductance of \(0.1\) H. A soft iron core of relative permeability \(1000\) is introduced inside cored coil and number of turns reduced to \(\left(\frac{1}{10}\right)^{th}\). The value of self inductance now becomes

An iron rod is placed parallel to magnetic field of intensity H. The magnetic flux through the rod is \(\Phi\) and its cross-sectional area is A. The magnetic permeability (\(\mu\)) of the rod is

Six very long insulated copper wires are bound together to form a cable. The currents carried by the wires are \(i_{1}=10\)A, \(i_{2}=-13\)A, \(i_{3}=10\)A, \(i_{4}=7\)A, \(i_{5}=-12\)A and \(i_{6}=18\) A. The magnetic induction at a perpendicular distance of \(10\) cm from the cable is \((\mu _{0}=4\pi \times 10^{-7}\) SI units\()\)

An arc of a circle of radius R subtends an angle \(\pi /2\) at the centre. It carries a current I. The magnetic field at the centre will be (\(\mu _{0}\) = permeability of free space)

If \(100\) J of work has to be done in moving an electric charge of \(4\) C from a place, where potential is \(-10\) V to another place where potential is V volt. The value of V is

Three point charges \(+q,-2q\) and \(-2q\) are placed at the vertices of an equilateral triangle of side a. The work done by some external force to increase their separation to '\(2a\)' will be \(\left(K=\frac{1}{4\pi \varepsilon _{0}}\right)\)

Two point charges, \(+2C\) and \(+6C\) repel each other with a force of \(12\)N. If a charge of \((-4C)\) is given to each of these charges, the force now is

In a potentiometer, the null point is obtained on \(7^{th}\) wire. What should we do to change the null point on \(9^{th}\) wire by keeping all other quantities same ?

The resistances in two arms of the metre bridge are \(5\Omega\) and \(R\) \(\Omega\) respectively, null point is obtained at length \(l_{1}\). When the resistance R is shunted with an equal resistance, the new balance point is at \(1.6l_{1}\). The resistance R is