# Category: Physics

## Mathematics of Circular Motion

Angular Displacement The angle which an object moves around a circle is called the angular displacement. This angle is usually expressed in radians. Hence, there are radians in one complete circle. The relationship between...

## How a Capacitor Discharge

How does a capacitor work? When a capacitor is connected across a power source, it starts charging up as current flows in the circuit.   Initially when the capacitor has not stored any charge,...

## Capacitance

What is a capacitor?   A capacitor is an electrical component that stores charge. It is usually made by having two parallel plates thinly separated by an insulating material. This material is also known...

## Gravitation and Circular Motion

Why does a orbiting satellite not fall to the Earth? A common misconception among students is that orbiting satellites do not experience gravity. It is argued that since these satellites are not falling to...

## Gravitation – Potential and Potential Energy

Gravitational Potential and Potential Energy Gravitational potential at a point is the amount of work needed to bring a unit mass from infinity to that point. Gravitational potential is defined to be negative since...

## Gravitation – Force and Field Strength

Concept of a Gravitational Field and Force A gravitational field is a region in which a mass experiences a force. A mass, that is present inside a gravitational field experiences a gravitational force. This...

## Work done in a Capacitor

Capacitor is an electrical component that stores charge. As charges are stored, potential energy in the capacitor also increases. In this post, I would like to explain how to calculate the energy stored in...

## IGCSE Definitions

This document contains the common definitions that may be asked in the Cambridge IGCSE examinations. IGCSE Definitions