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### Basic Definitions in Physics

##### Gravitational field strength

The gravitational field strength is the force per unit mass.

##### Charge

The charge is the property of some elementary particles that gives rise to an interaction between them and consequently to the host of the material phenomena described as electrical.

##### Coulombs

The coulomb is the quantity of charge which passes any section of a conductor in 1 second when a current of 1 Amp is flowing as given by the equation Q = I x A.

##### Volt

The volt is the potential difference between 2 points in a circuit when 1 J of electrical energy is converted to other form of energy when 1 C passes from 1 point to the other.

##### Resistance

The resistance is the ratio of potential difference across an electrical component to current passing through it.

##### Ohm

The ohm is the resistance of a conductor through which a current of 1 A is flowing when potential difference across it is 1 V.

##### Electric potential at a point

The electric potential at a point is the workdone in bringing unit charge from infinity to the point.

##### Capacitance

The capacitance is the charge stored per unit potential difference applied to the capacitor.