Electromagnetism - Part 1: Theory and Definitions - Lorentz force, Biot-Savart Law, Ampere’s Force Law, Electromagnetic Induction, Self and Mutual Induction

Here's a quick outline of the topics which will be introduced in this tutorial:

Target Audience: High School Students, College Freshmen and Sophomores, students preparing for the International Baccalaureate (IB), AP Physics B, AP Physics C, A Level, Singapore/GCE A-Level; 

Class 11/12 students in India preparing for ISC/CBSE and Entrance Examinations like the IIT-JEE/AIEEE Anyone else who needs this Tutorial as a reference!


Lorentz force


Biot-Savart Law

Helps you asses the magnetic field intensity created by a moving charge.

Ampere’s Force Law

The force acting on a current carrying conductor in a magnetic force is called Ampere’s force

Electromagnetic Induction

• The phenomenon of electromagnetic induction states that an induced current appears in a closed conducting loop when the magnetic flux enclosed by the loop is changed.

Self and Mutual Induction

• The process of variation of current in a circuit leading to induced e.m.f. in the circuit is called Self Induction.

Here are some of the problems solved in this tutorial :


Q: In the figure shown, a coil of single turn is wound on a sphere of radius r and mass m. The plane of coil is parallel to the inclined plane and lies in the equatorial plane of the sphere. If sphere is in rotational equilibrium, Find the value of B. Let i be the counter-clockwise current through the coil when observed from the top.

Q: Three rings, each having equal radius R, are placed mutually perpendicular to each other and each having it’s center at the origin of the co-ordinate system. If current I flows through each ring, find the magnitude of magnetic field at the common center i.e, origin.

Complete Tutorial with Solved Problems :