Physics Class X - Electromagnetism Lecture Notes

Flashcards covering key concepts in electromagnetism from the physics lecture notes.

E=mc²

Formula relating energy (E) to mass (m) and the speed of light (c) squared.

Magnetic Poles

Regions of a magnet where the magnetic force is strongest; north and south poles.

Magnetic Field Lines

Imaginary lines that represent the direction and strength of a magnetic field.

D.C. Motor

An electrical device that converts electrical energy into mechanical energy using direct current.

Induced e.m.f.

Electromotive force (voltage) generated in a circuit due to a changing magnetic field.

Mutual Induction

The process by which a change in current in one coil induces e.m.f. in another coil.

Transformer

A static machine used for transforming power from one circuit to another without changing the frequency.

Step-Up Transformer

Increases the secondary voltage above the primary voltage.

Step-Down Transformer

Decreases the secondary voltage below the primary voltage.

Lenz's Law

Induced current flows in a direction to oppose the change causing it.