List of top Physics Questions asked in MHT CET

A stone of mass \(100\ \text{g}\), attached at the end of a \(1\ \text{m}\) long string is whirled in a horizontal circle. If the string makes an angle '\(\theta\)' with the vertical, then the value of centripetal force acting on the stone is (Take \(g=10\ \text{m/s}^{2}\))

Out of the following vectors, identify the one which is normal to the force, \(\vec{F}=4\hat{i}-3\hat{j}\).

The electric potential ' \(V\) ' at a radial distance \(x\) just outside a non-conducting sphere is \(\frac{\rho R^{2}}{2\varepsilon _{0}x}\). The electric intensity ' E ' at a radial distance \(x\) is ( \(\rho\) is uniform volume charge density, \(R\) is the radius of the sphere and \(\varepsilon _{0}\) is the permittivity of free space)

Identify the INCORRECT statement

The components which are used in regulated power supply as rectifier, filter and voltage regulator are

Which of the following statements is NOT true?

The condition for observing Fraunhofer diffraction from a single slit is that the wavefront incident on a single slit must be

At the stopping potential, the photoelectrons have

The ratio of angular frequency (\(\omega\)) of an electron to the total energy ( E) of an electron in the first orbit of hydrogen atom is ( \(h\) is the Planck's constant)

The equation ;
\(4\ {}_{1}^{1}\text{H}\rightarrow {}_{2}^{4}\text{He}^{2+}+2\ e^{-}+26\ \text{MeV}\)
represents

The equation of two interfering light waves are
\(y_{1}=b\cos \omega t\) and \(y_{2}=b\sin (\omega t+\Phi )\).
If the light waves interfere destructively, then the possible value of \(\Phi\) are

Three beams of blue, green and orange colour are made to pass separately through a prism . In the position of minimum deviation, the angle of refraction will be (the angle of prism is \(60^{\circ }\))

An unpolarized beam of light having flux \(10^{-2}\) W falls normally on a rotating polarizer of cross-sectional area \(3\times 10^{-4}\) \(\text{m}^{2}\). If the energy of light passing through the polarizer per revolution is \(10^{-2}\) J, then the polarizer is rotating with the angular frequency of

In an experiment to measure the power of a convex lens, the least count of measuring scale for the position of object \(u\) and the position of image \(v\) are \(\Delta u\) and \(\Delta v\) respectively. The error \(\Delta P\) in measurement of power of a convex lens will be

A resistance 'R' draws a power 'P' when connected to A.C. source. If an inductor is now placed in series with the resistance, such that the impedance of the circuit becomes 'Z', the power drawn is \({}'P_{1}'\). The ratio of \(P_{1}/P\) is

In series LCR circuit the alternating emf 'e' and the current 'i' are given by the equations \(e=e_{0}\cos \omega t\), \(i=i_{0}\sin \left(\omega t+\frac{\pi }{6}\right)\). The average power dissipated in the circuit over a one complete cycle of A.C is (\(\cos 60=1/2\))

The r.m.s value of current in a 50 Hz A.C. circuit is 10 A. The average value of A.C. current over a cycle is

Identify the CORRECT statement

The magnetic field inside the solenoid is

The current in a primary coil of a step-down transformer having \(N_{p}\) turns is given by \(i=i_{0}\cos \omega t\). The secondary coil having \(N_{s}\) turns is wound over the primary coil. The emf induced in the secondary is

A circular loop carrying a current' I' is made of a wire of length 'L'. A uniform magnetic field 'B' exists parallel to the plane of the loop. The torque experienced by the circular loop will be

Magnetic susceptibility (\(\chi\)) is related to magnetic relative permeability (\(\mu _{r}\)) by the relation

A metallic rod of length \({}'l'\) is tied to a string of length \({}'2l'\) and made to rotate with angular speed \({}'2\omega '\) on a horizontal table with one end of the string fixed. If there exists a vertical magnetic field 'B' in the region, the emf \({}'e'\) induced across the ends of rod is

The electric potential due to a dipole at point P making an angle \(120^{\circ }\) with the axis of a dipole is
(\(\varepsilon _{0}\) = permittivity of free space, \(p\) = electric dipole moment , \(r\) = distance of point P from the center of dipole)
(\(\cos 60^{\circ }=1/2\))

A galvanometer of resistance \(90\ \Omega\) is shunted by a resistance of \(10\ \Omega\). The fraction of main current that passes through shunt is