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

For a wave, y = 0.0002 sin`[2pi(110"t"-x/3)+pi/3]` is travelling in a medium. The energy per unit volume being transferred by wave if density of medium is 1.5 kg/m³, is ______.

A γ-ray photon is passing near a nucleus and breaks into an electron and positron. The region contains a uniform magnetic field B perpendicular to the plane of motion. Find the time after which they again converted into γ-ray. The force of electrostatic interaction and gravitational interaction may be neglected.

Two positively charged particles each having charge Q and are d distance apart. A third charge is introduced in midway on the line joining the two. Find nature and magnitude of third charge, so that the system is in equilibrium ______.

A current carrying closed loop in the form of a right angled isosceles ΔABC is placed in a uniform magnetic field acting along AB. If the magnetic force on the arm BC is F, then force on the arm AC is ______.

The magnetic moment of the current carrying loop shown in the figure is equal to ______.

Choose the correct option.

If the pressure of an ideal gas decreases by 10% isothermally, then its volume will ______.

The maximum velocity of the photoelectron emitted by the metal surface is v. Charge and the mass of the photoelectron is denoted by e and m, respectively. The stopping potential in volt is ______.

The energy of the incident photon on the metal surface is 3 W and then 5 W, where W is the work function for that metal. The ratio of velocities of emitted photoelectrons is ______.

A given sample of an ideal gas occupies a volume V at a pressure P and absolute temperature T. The mass of each molecule of the gas is m. Which of the following gives the density of the gas?

If M₀ and L₀ denote the orbital angular moment and the angular momentum of the electron due to its orbital motion, then the gyromagnetic ratio is given by ______

The equation of a simple harmonic motion is given by, x = 8 sin (8πt) + 6 cos (8πt), the initial phase angle is ______

A circular coil of radius R has a resistance of 40 Ω. Figure shows two points P and Q on the circumference separated by a distance `(pi"R")/2`, which are connected to a 16 V battery with internal resistance of 0.5 Ω. What is the value of current I flowing through the circuit?

The maximum velocity of photoelectron emitted is 4.8 m/s. If the e/m ratio of the electron is 1.76 × 10¹¹ C/kg, then stopping potential is given by ______ 

The magnetic moment of electrons due to orbital motion is proportional to ______.

(n = principal quantum numbers)

The ratio of energies of photons produced due to transition of electron of hydrogen atom from its (i) second to first energy level and (ii) highest energy level to second level is respectively.

The kinetic energy of the most energetic photoelectron emitted from a metal surface is doubled when the wavelength of the incident radiation is reduced from λ₁ to λ₂. The work function of the metal is ______

Which of the following is not a property of light?

Temperature and Heat are ______

The S.I. unit of gyromagnetic ratio is ______

At extreme positions of a particle executing simple harmonic motion, ______