HSC Science (General) इयत्ता १२ वी - Maharashtra State Board Question Bank Solutions for Physics

In a CE amplifier, the current gain is 80 and the emitter current is 9 mA. The base current is ______.

What is a photocell or photoelectric cell?

Describe its construction and working with a neat labelled diagram.

Find the wavelength and wave number of the first member of the Balmer series in Hydrogen spectrum. (`R =1.097xx10^7m^(-1)`)

A rectangular coil of wire 50 turn each of area 6 x 10^-4 m² is freely suspended in a field of 3 x 10^-2 Wb / m². Calculate the current flowing through the coil when it deflects through 60°, when torsional constant is 3.82 x 10^-6 SI unit.

Describe construction and working of a photo cell with the help of neat diagram.

State laws of reflection.

The internal energy of one mole of argon at 300 K is ______. (R = 8.314 J/mol.K)

When the load resistance across a solar cell is zero, the current in the external circuit passed by the solar cell is called ______.

The de-Broglie wavelength of the electron in the hydrogen atom is proportional to ______.

State the dimensions of magnetization.

State the dimensions of magnetization.

What is the rotational analogue of Newton's second law of motion?

State and define the SI unit of mutual inductance.

The speeds of a particle performing linear SHM are 8 units and 6 units at respective displacements of 6 cm and 8 cm. Find its period and amplitude.

The molar specific heat of He at constant volume is 12.47 J/mol.K. Two moles of He are heated at constant pressure. So the rise in temperature is 10 K. Find the increase in internal energy of the gas.

Two coils having self inductances L₁ = 75 mH and L₂ = 55 mH are coupled with each other. The coefficient of coupling (K) is 0. 75. Calculate the mutual inductance (M) of the two coils

Define peak value of alternating signal.

A steam engine delivers 4.8 x 10⁸ Jof work per minute and services 1.2 x 10⁹ J of heat per minute from its boiler. What is the percentage efficiency of the engine?

A spring balance has a scale that reads from 0 to 50 kg. The length of the scale is 20 cm. A body suspended from this balance, when displaced and released osillates with a period of 0.6 sec. What is the weight of the body?