12 SCI 122 Session 14 Electric Circuits Basic components Voltage or energy

# 12 sci 122 session 14 electric circuits basic

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12 SCI-122 Session 14 Electric Circuits: Basic components Voltage or energy source (A device that can raise electric charges to a higher potential against an electric field) Dry cell batteries DC power supply Electric generators SCI-122 Session 14 Electric Circuits: Basic components Conducting paths (Conduits through which electric current can flow and control devices that can disrupt the flow of currents) Wires Switches Fuses Circuit breakers SCI-122 Session 14 Electric Circuits: Basic components Loads (Devices on which the electric charges will do work or devices that will use up the electric energy provided) Light bulbs Motors Heating elements Commercial resistors

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13 R V + Voltage gain Voltage drop “R” The ski slope analogy I I SCI-122 Session 14 Electric Circuits: Basic configurations Series circuits in which the loads are connected one after another from one end of the voltage source to the other Voltage gain Voltage drop “R1” The ski slope analogy Series Circuit “R2” “R3” R 2 V + R 1 R 3 I I
14 SCI-122 Session 14 Electric Circuits: Basic configurations Parallel circuits in which each load is connected directly to the two ends of the voltage source Voltage gain Voltage drop The ski slope analogy Parallel Circuit I R 3 R 2 R 1 V S + I 1 I 2 I 3 “R1” “R2” “R3” SCI-122 Session 14 Electric Circuits: Basic configurations Combination circuits in which loads are connected in both series and parallel configurations

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15 SCI-122 Session 14 Review Electric potential difference (voltage) Electric field Electric potential Electric current Conventional vs. electron current Drift velocity Direct vs. alternating current SCI-122 Session 14 Review Electrical resistance Contributions to resistance Resistances in series Resistances in parallel Ohm’s Law Electrical circuits SCI-122 Session 14 Think Tank Why do electric ranges and electric clothes dryers use 220 V receptacles rather than the 110 V receptacles?

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