ELECTRICITY

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# ELECTRICITY - PowerPoint PPT Presentation

ELECTRICITY. D.C. stands for direct current which flows in one direction only (- to +) A.C.stands for alternating current which changes direction 50 times per second. ELECTRICITY. D.C. is seen as a straight line on the oscilloscope. A.C. is seen as a wavey line on the oscilloscope.

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## PowerPoint Slideshow about 'ELECTRICITY' - carla-faulkner

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Presentation Transcript
ELECTRICITY

D.C. stands for direct current which flows in one direction only (- to +)

A.C.stands for alternating current which changes direction 50 times per second.

ELECTRICITY
• D.C. is seen as a straight line on the oscilloscope.
• A.C. is seen as a wavey line on the oscilloscope.
ELECTRICITY
• An electric current is a flow of charged particles called electrons.
• You will see the circuit symbols on the side wall.
ELECTRICITY
• Current has the symbol I and is measured in amps (A)
• Resistance has the symbol R and is measured in ohms (W)

Voltage has the symbol V and is measured in volts(V)

ELECTRICITY
• Current is measured with an ammeter in series.
• Voltage is measured with a voltmeter in parallel.
ELECTRICITY
• V = IxR

V

I

R