Ch 35 Electric Circuits Electric Circuits

Ch 35 Electric Circuits Circuit Symbols

Three Types of Circuits Ch 35 Electric Circuits Three Types of Circuits Series Parallel Compound

Series Circuits Series circuits have 1 path for charges to flow. Ch 35 Electric Circuits Series Circuits Series circuits have 1 path for charges to flow.

Ch 35 Electric Circuits Series Circuits Voltage may be different across different objects in a series circuit. Sum of the individual voltages = source voltage Current is the same in all parts of a series circuit. Equivalent Resistance is the sum of individual resistors

Ch 35 Electric Circuits Parallel Circuits A parallel circuit has two or more paths for charges to move.

Ch 35 Electric Circuits Parallel Circuits Voltage is the same across each element in a parallel circuit. Current may vary through different elements in a parallel circuit. Sum of the individual currents = source current. Equivalent Resistance calculated through the inverses:

Ch 35 Electric Circuits Compound Circuits A compound circuit has both series and parallel parts.

Solving Circuits Calculate the equivalent resistance Ch 35 Electric Circuits Solving Circuits Calculate the equivalent resistance Use Ohm’s Law (V=IR) practice

Adding Resistance in Series Ch 35 Electric Circuits Adding Resistance in Series When you add resistance in series: Total resistance increases Current decreases

Equivalent Series Circuits Ch 35 Electric Circuits Equivalent Series Circuits Rseries = R1 + R2

Adding Resistance in Parallel Ch 35 Electric Circuits Adding Resistance in Parallel When you add resistance in parallel: Total resistance decreases Current increases

Equivalent Parallel Circuits Ch 35 Electric Circuits Equivalent Parallel Circuits

Household Circuits Household circuits are: parallel circuits Ch 35 Electric Circuits Household Circuits Household circuits are: parallel circuits Typically designed to carry 15 Amperes of current - maximum.

Ch 35 Electric Circuits Overloading Circuits Since adding resistance to a parallel circuit causes current to increase, adding appliances to a household circuit causes current in the house wiring to increase. This means wires must dissipate more heat energy (P = I2R).

Ch 35 Electric Circuits Short Circuits A short circuit is a very low resistance path in a circuit. A short circuit will also cause large amounts of current to flow in a circuit and overload the circuit.

Fuses & Circuit Breakers Ch 35 Electric Circuits Fuses & Circuit Breakers Fuses and circuit breakers act as automatic switches in a circuit to prevent dangerous currents from flowing.

Ch 35 Electric Circuits The End