Coursework.Info - Inspiration in an Instant

On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:

Physics Coursework Resistance Resistance means opposition and if an electric component opposes the passage of electric charge, its said to have resistance. If it's a component which is especially designed to control how much charge flows per second then it's actually called a resistor. The cause of resistance is the friction between materials and moving parts. We need resistance because a battery or generator is needed to drive a current. Resistance arises in all components of a circuit. The wires that connect the components should have as little resistance as possible, the resistance in a lamp is an important part of the current because the resistance of a lamp causes electrical energy to change into other forms, such as heat and light. The electrical resistance of a conductor is simply a measure of the potential difference required to maintain a currents. Both the heating effect of a current and the electrical...

Get instant access

• Instant, unlimited access to our documents in full
• Swap your work for free access, or pay £4.99
• To see the full version of this document and 150,159 others