Physics Unit 2 CAPE Study Guide

These flashcards cover key concepts from a CAPE Physics Unit 2 study guide, including electrostatics, circuits, magnetism, and nuclear physics. They are designed to help with review and exam preparation.

Electric Field

A region around a charged body where a force is experienced.

Electric Field Strength

The force acting per unit positive charge.

Relationship between E and V

The electric field strength E at a point is numerically equal to the potential gradient at that point

Electric Current

The rate of flow of charge.

e.m.f. of a source

The energy converted from chemical (or mechanical) energy into electrical energy per unit charge flowing through it.

Internal Resistance

The resistance that is internal to the cell.

Kirchhoff's First Law

States that the sum of the currents flowing into any point in a circuit is equal to the sum of the currents flowing out of that point.

Kirchhoff's Second Law

States that, the algebraic sum of the e.m.f.s around any loop in a circuit is equal to the algebraic sum of the p.d.s around the loop.

Drift Velocity

The mean value of the velocity of the electrons in a conductor when an electric field is applied.

Resistance

The ratio of the potential difference (V) across the conductor to the current (/) flowing through it.

Ohm's Law

The current flowing through a conductor is directly proportional to the potential difference across it provided that there is no change in the physical conditions of the conductor.

Magnetic Flux

The total amount of magnetic flux through an area A at right angles to a magnetic field.

Capacitor

Device that stores electric charge.

Capacitance

The charge stored per unit potential difference.

Cylindrical piece of metal

The metal that exists through it. The electric field strength removes electrons from some of the air molecules, thus forming ions.

Electrostatic Dust Extraction

The charged dust particles are then attracted to the inner walls of the cylinder.

Areas on the drum exposed to light

The light loses their positive charge.