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

Obtain an expression for the self inductance of a solenoid.

1 Weber/second is equal to ______.

For a medium of permeability µ, its magnetic susceptibility x is [µ 0 = permeability of vacuum]

For a medium of permeability µ, its magnetic susceptibility x is [µ 0 = permeability of vacuum]

A liquid rises to a height of 5 cm in a glass capillary tube of radius 0.02 cm. The height to which the liquid would rise in a glass capillary tube of radius 0.04 cm is ______.

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.