University:
Eastern Kentucky University
Course:
PHY 202 | University Physics II
Academic year:

2022
Views:

413

Pages:

3
Author:

levedzgetmo7f

TYPES OF CIRCUITS AND OHM’S LAW Types of Circuits If any part of a series circuit is broken, the circuit fails. o If either light is unscrewed both lights will turn of The branches (paths) of a parallel circuit are independent. o Your House is wired in parallel, so that each light and appliance can be turned on and of independently. If either light is unscrewed, the other will remain on. Series Circuits have all only one path for electricity to flow. Two light bulbs in series. Each light is dependent on the h Parallel circuits have multiple paths for the electricity to flow Two lightbulbs in parallel. Each light is independent of h h Ohm’s Law Increasing Voltage increase currents Voltage (in Volts) Increasing resistance decreases current Currents (in amps) Decreasing voltage decreases current Decreasing resistance increase currents I= v / R Resistance (in ohms) Current Currents equals the voltage divided by the resistance. Also, v= IR and R=V/I Current is moving electrons, moving charge Increasing current causes more electricity to move through a device Increasing electricity through a device causes it to work faster (in a motor) or be (brighther (in a lightbulb) Voltage Voltage is electrical potential: how much work a battery can do Voltage is linked to energy: 1 volt of voltage = 1 joule of energy per coulomb of charge TYPES OF CIRCUITS AND OHM’S LAW To increase voltage, you could use a stronger battery OR add batteries More Voltage is like a stronger pump, giving more force and more current The lightbulb does not light here, because the two batteries are pushing opposite directions. To add together, batteries must facing the same direction. Resistance Resistance slows down current thinking of resistance like a dam holding back water Adding devices in a circuit increasing resistance More resistance = less currents Less current = less light EXAMPLES OF THE UNITS 1. I= 4 amps 2. V= 4 volts 3. R= 4 ohms (Ω) 4. E= 4 newton 5. P= 4 watts 6. F= 4 Joules Types of Units The units for current is Amps; the abbreviation is I The units of voltage is Volts; the abbreviation is V The units of resistance is Ohms; the abbreviation is R TYPES OF CIRCUITS AND OHM’S LAW Series and Parallel Circuits Series: only one path for the electricity Series: dependent path Series: If you turn of one light, all the lights turn of Parallel: How your house is wired Parallel: Independent current paths Parallel: Can turn of one light without others turning of Parallel: More than one path for the electricity to flow. Question to get an idea on circuits I you increase voltage, the current will increase, or decreases? It would Increase. If you decrease resistance, the current will increase or decrease? It would increase. If the current increase, the resistance increased or decreased? It decreases. If the voltage is decrease, the current will increase or decrease? It would decrease. If the current decreases, the voltage increases or decreases? It would decrease. If there is more current will a light bulb be brighter or dimmer? It would be Brighter.

Types of Circuits and Ohm's Law

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