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The time period of an AC supply is

The time in seconds taken to complete one cycle or one sine wave

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The frequency of an AC supply is

The number of cycles or sine waves completed in one second

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The frequency of an AC supply equals

1 divided by the time period T of the sine wave

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The time period of an AC supply equals

1 divided by the frequency F of the sine wave

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The Impedance value of an AC circuit is the sum of which of the following values?

Resistance, inductive reactance and capacitive reactance

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Resistance, inductive reactance and capacitive reactance are all measured in

Ohms

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EMF is an acronym for

Electro motive force

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EMF is measured using an

Volt meter

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Current in an AC circuit is most commonly measured using an

Clamp meter

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When measuring the resistance value of a circuit or circuit components, the circuit must be

De energised

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The instrument used to measure the insulkation resistance of a circuit or circuit components, is a

Megger meter

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The minimum acceptable value in megger ohms, for insulation resistance of a circuit is

1 megger ohm

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Before using an electrical measuring instrument to measure electrical quantities of a circuit

the operation must be verified on a known live source

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Four common waveforms used to graphically display an electrical supply are

DC, Sine, Square, Triangle

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Current in a DC circuit

Constantly flows in one direction

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Current in a AC circuit

Constantly changes direction of flow

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Current is caused to flow in the secondary winding of a transformer due to what electrical principle?

Mutual induction

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The magnetic field developed in the primary winding of a transformer cuts across the secondary winding causing

a current to flow in the secondary winding

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the names of the two types of transformer construction are

Core and shell

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