ELECTRIC CURRENT

Physics

CURRENT ELECTRICITY

CURRENT ELECTRICITY.

Electric potential difference and electric current

Electric current

Electric potential difference (p. d) is defined as the work done per unit charge in moving charge from one point to another. It is measured in volts.

Electric current is the rate of flow of charge. P. d is measured using a voltmeter while current is measured using an ammeter. The SI units for charge is amperes (A).

Physics

MAGNETIC EFFECT OF AN ELECTRIC CURRENT

MAGNETIC EFFECT OF AN ELECTRIC CURRENT.

Introduction: Oersted’s discovery.

Hans Christian Oersted discovered the magnetic effect of a current in 1819. The direction of the field is dependent on the direction of the current.

This discovery brought about the development of electric bells, electric motors, telephone receivers and radios.