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

Define angular S.H.M. and obtain its differential equation.

A circular loop of radius 0.0157 m carries a current 2 A. The magnetic field at the centre of the loop is ______  

Calculate the value of the magnetic field at a distance of 2 cm from a very long straight wire carrying a current 5 A?

Derive an expression for axial magnetic field produced by current in a circular loop.

Write the differential equation for angular S.H.M.

What is the average value of alternating current over a complete cycle?

A bar magnet of mass 120 g in the form of a rectangular parallelepiped, has dimensions l = 40 mm, b = 10 mm and h = 80 mm, with its dimension ‘h’ vertical, the magnet performs angular oscillations in the plane of the magnetic field with period π seconds. If the magnetic moment is 3.4 Am², determine the influencing magnetic field.

A flat circular coil of 70 turns has a diameter of 20 cm and carries a current of 5 A. Find the magnitude of the magnetic induction at a point on the axis 20 cm from the centre of the coil.

Define the sphere of influence.

Define the molecular range.

What is the approximate value of the power factor of a choke coil with, R = 10 Ω and reactance = 100 Ω?

The power factor of LCR circuit is ______.

A particle executes S.H.M. of amplitude 3 cm. Its acceleration at extreme position is 27 cm/s² Calculate its angular velocity.

Chalk particles cling to the black board due to ______.

The effective capacitor between A and B in the following circuit is ______.

Explain the theory of an AC circuit with a resistor. 

The power factor for a choke coil is ______.

Where is the power dissipated in an alternating current circuit?

Explain the term choke coil.

Obtain an expression for Energy Density of a magnetic field.