HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions for Physics

Describe in brief the different ways of electron emission from a metal surface.

An ideal gas is taken through a cyclic process ABCDA as shown in figure. The net work done by the gas during the cycle is ______.

What do you mean by wave frequency associated?

What do you mean by Wave number associated?

Two consecutive harmonics of air column in a pipe closed at one end are frequencies 150 Hz and 250 Hz. Calculate the fundamental frequency.

Two organ pipe, open at both ends, are sounded together and 5 beats are heard per second. The length of shorter pipe is 0.25 m. Find the length of the other pipe. (Given: Velocity of sound in air = 350 m/s and end correction at one end = 0.015 m, same for both pipes.)

Explain how can a gas be expanded at constant temperature.

Draw a neat labelled diagram of Polarization of light.

Draw a neat labelled diagram of Polarization by reflection.

Calculate the values of x and y in the following nuclear reaction.

\[\ce{^227_89Ac -> ^211_82Pb + x[^4_2He]+ y[^0_-1e]}\]

What is binding energy of nucleus?

In a cyclic process, if ΔU = internal energy, W = work done, Q = Heat supplied then ______.

Prove the Mayer's relation `C_p - C _v = R/J`

Derive an expression for critical velocity of a satellite revolving around the earth in a circular orbit.

A coin kept at a distance of 5cm from the centre of a turntable of radius 1.5m just begins to slip when the turntable rotates at a speed of 90 r.p.m. Calculate the coefficient of static friction between the coin and the turntable.

[g = 9.8 m/s²]

A sonometer wire vibrates with frequency n₁ in air under suitable load of specific gravity of . When the load is immersed in water, the frequency of vibration of wire n₂ will be .........

What is the decrease in weight of a body of mass 600kg when it is taken in a mine of depth 5000m?

[ Radius of earth = 6400km, g = 9.8 m/s² ]

The period of a conical pendulum in terms of its length (l), semi-vertical angle (θ) and acceleration due to gravity (g) is ______.

If the metal bob of a simple pendulum is replaced by a wooden bob of the same size, then its time period will.....................

1. increase
2. remain same
3. decrease
4. first increase and then decrease.

The numerical aperture of objective of a microscope is 0.12. The limit of resolution, when light of wavelength 6000A is used to view an object is.......................

1. 0.25 * 10^-7m
2. 2.5 * 10^-7m
3. 25 * 10^-7m
4. 250 * 10^-7m