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

Derive an expression for the electric potential energy of an electric dipole in a uniform electric field.

A toroid of a circular cross-section of radius 0.05 m has 2000 windings and a self-inductance of 0.04 H. What is (a) the current through the windings when the energy in its magnetic field is 2 × 10⁻⁶ J and (b) the central radius of the toroid?

The relation between relative permeability (`mu_r`) and magnetic susceptibility (`chi_m`) is:______.

The relation between relative permeability (`mu_r`) and magnetic susceptibility (`chi_m`) is:______.

A motor cyclist rides in a vertical hollow sphere of radius 5 m. Find minimum angular speed required so that it does not loose contact with the sphere at the highest point. (g = 9.8m/s²)

Derive the relation between electric intensity and electric potential. 

Give the name of the following symbol.

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

Which of the following graphs shows the variation of the fringe width with the frequency of light in a two source interference pattern?

Draw a neat labelled schematic diagram of LED.

What is the excess of pressure inside a soap bubble of radius 3 cm if the surface tension of the soap solution is 30 dyne/cm?

A steel blade floats on the surface of pure water. When detergent is added, it sinks, why? What is capillarity?

Distinguish between light-emitting diode and photo-diode.

Explain the term sphere of death.

Draw a neat labelled diagram to determine unknown resistance using a meter bridge.

Draw a neat labelled diagram of Kelvin's meter bridge circuit for the measurement of galvanometer resistance.

Why the ring jumps several metres in air in jumping ring experiment?

Find the radius of the wire of length 25m needed to prepare a coil of resistance 25Ω. (Resistivity of material of wire is 3.142 x 10^-7Ωm)

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.

Absorption of water by filter paper is due to ______.