MAH-MHT CET (PCM/PCB) entrance exam Question Bank Solutions for Physics

An electron revolving in a circular orbit of radius 'r' with velocity 'V' and frequency 'v' has orbital magnetic moment 'M'. If the frequency of revolution is doubled then the new magnetic moment will be ____________.

An electron (e) is revolving in a circular orbit of radius 'r' in hydrogen atom. The angular momentum of the electron is (M = magnetic dipole moment associated with it and m = mass of electron) ____________.

A motorcyclist rides in a horizontal circle about central vertical axis inside a cylindrical chamber of radius 'r'. If the coefficient of friction between the tyres and the inner surface of chamber is 'µ', the minimum speed of motorcyclist to prevent him from skidding is ______.

('g' =acceleration due to gravity)

An electron of charge 'e' is revolving in a fixed orbit of radius 'r' with frequency 'f'. Its magnetic dipole moment is ____________.

Magnetic moment of revolving electron of charge 'e' and mass 'm' in terms of angular momentum 'L' of electron is ____________.

An electron in the ground state of hydrogen atom is revolving in a circular orbit of radius R. The orbital magnetic moment of the electron is ____________. (m = mass of electron, h = Planck's constant, e = electronic charge)

The pressure at the bottom of a tank containing liquid does not depend upon the ______.

A parallel beam of fast-moving electrons is incident perpendicular on a narrow slit. The distance between slit and screen is large. If the speed of the incident electrons is increased then which one of the following statements is correct?

In the biprism experiment, fringes are obtained using monochromatic light. The distance between the 5^th bright band and 9^th dark band on the same side of the central bright band, in terms of the fringe width 'X' is ______

When light enters glass from vacuum then the wavelength of light ______ 

Two parallel plates separated by a distance 'd' are kept at potential difference 'V' volt. A charge 'q' of mass 'm' enters in parallel plates with some velocity. The acceleration of the charged particle will be ______ 

The potential differences that must be applied across the parallel and series combination of 3 identical capacitors are such that the energy stored in them becomes the same. The ratio of potential difference in parallel to series combination is ______

The electron in hydrogen atom is moving in an orbit of radius 0.53 Å. It takes 1.571 x 10^-16 s to complete one revolution. The velocity of electron will be `pi` = 3.142.

A particle moves along a circular path of radius 'r' with uniform speed 'V'. The angle described by the particle in one second is ______.

In the case of conical pendulum, if 'T' is the tension in the string and 'θ' is the semi-vertical angle of cone, then the component which provides necessary centripetal force is ______.

In an atom, electron of charge (-e) perform U.C.M. around a stationary positively charged nucleus, with period of revolution 'T'. If 'r' is the radius of the orbit of the electron and 'v' is the orbital velocity, then the circulating current (I) is proportional to ____________.

The earth moves around the sun in an elliptical orbit as shown in the figure. The ratio, `"OA"/"OB"` = x. The ratio of the speed of the earth at Band at A is ______.

The graph between restoring force and time in case of S.H.M is ______.

A capacitor C₁ = 4µF is connected is series with another capacitor C₂ = 1µF. The combination is connected across d.c. source of 200 V. The ratio of potential across C₂ to that across C₁ is ______.

In the circuit shown, the potential difference across the 4.5 µF capacitor is ______.