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TSR Wiki > Study Help > Subjects and Revision > Revision Notes > Physics > Electrical Definitions

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Contents 1 Charge 2 Current 3 Power 4 Parallel 5 Series 6 Comments

Charge

• Charge is conserved, measured in coulombs (1 amp per second).
• Charge of an electron = -1.6 x 10^-19 C
• No. of electrons that carry 1 C = 6.25 x 1018
• Charge = the area under an I-T graph.
• 1 coulomb is the quantity of charge that passes a point in a second when the current flowing through is 1amp.

Current

• Current is the rate of flow of charge. Measured in Amps.
• 
• current, charge, time

Power

• Power is the rate of energy transfer. Measured in Watts (W).
• 
• power, voltage, current

Parallel

In parallel, the voltage across each branch of the circuit is the same because the branches are connected to the same two points.

Series

In a series circuit, the current is the same through all the components.

Comments