Electricity Friction www.assignmentpoint.com

Electrical Force www.assignmentpoint.com

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An object becomes charged by Friction Conduction Induction www.assignmentpoint.com

Charging by Friction www.assignmentpoint.com

Charging by induction. www.assignmentpoint.com

Charging by conduction.

Electricity can be described like flowing water. Potential Electricity can be described like flowing water. Current Load www.assignmentpoint.com

Charge flows in an Electric Circuit. Switch Charge is a quantity of electricity. Charge has the unit coulomb (C). www.assignmentpoint.com

An electric circuit has 4 parts: Switch Load Power Source Connecting Wires www.assignmentpoint.com

Flowing charge is called current Flowing charge is called current. The symbol is I and the unit is the ampere or amp (A). SIM www.assignmentpoint.com

Voltage IS Potential Energy!!! Voltage IS NOT flowing charge. Voltage is a measure of the potential difference between two places in a circuit. The unit is the Volt (V). Voltage IS Potential Energy!!! Voltage IS NOT flowing charge. www.assignmentpoint.com

Batteries convert chemical energy into electrical energy! douglasbattery.com 1. Dry Cell Battery creative-science.org 2. Wet Cell Battery channel4.com www.assignmentpoint.com

Power plants use generators to produce power Power plants use generators to produce power. This generator is called a turbine. www.assignmentpoint.com

AC/DC Direct current (DC) is charge moving in one direction Alternating current (AC) is charge moving back and forth. Batteries produce direct current (DC). The power company uses electrical generators to produce alternating current (AC). 120V of AC is available at your house’s wall sockets. It is more efficient for power companies to send AC to your house, but most electrical devices need DC. These devices have components inside them that convert AC into DC. www.assignmentpoint.com

120V AC 9V DC 1.5V DC www.assignmentpoint.com i.b5z.net/i/u/1572720/i/ personalsafetysite.com/images diversion-safes.com www.assignmentpoint.com 1.5V DC sanitarysupplyco.com

Electrical Resistance. This is when current flow is slowed down. Current seems to lose energy. Actually, the electrical energy is converted into heat and/or light. The symbol is R. The unit is the ohm (). absak.com Water Heater Element harrisrcs.com alibaba.com Light bulb Stove Top Burners www.assignmentpoint.com

A conductor’s electrical resistance depends on Four Variables. The length of the conductor. The cross-sectional area of the conductor. The material of which the conductor is made. The temperature of the conductor. www.assignmentpoint.com

V = Voltage I = Current R = Resistance (SIM1) (SIM2) The relationship between voltage, current, and resistance is V = I · R or Ohm’s Law V = Voltage I = Current R = Resistance (SIM1) (SIM2) fm-transmitter.com Digital Multimeters can measure voltage, current, resistance, and more. esitest.com/img www.assignmentpoint.com

Paying for Electricity. Electrical Work. A voltage source does work when releasing charge. The unit of electrical work is joules (J). Electrical Power. The unit of power is called the watt (W). power = current · voltage P = I · V Paying for Electricity. The electric company charges you based on the amount of power and the amount of time. The unit is kilowatt-hour (kW-hr). 1 kW = 1,000 Watts www.assignmentpoint.com

Several things in our homes consume electricity. eere.energy.gov Several things in our homes consume electricity. www.assignmentpoint.com

The hot water heater uses electricity to heat water. eere.energy.gov The hot water heater uses electricity to heat water. www.assignmentpoint.com

Look for this sticker to find out how your appliance compares to others that are similar. www.assignmentpoint.com eere.energy.gov

SIM Does it cost more to use a 100-W light bulb for 1 hour or 3 hours? Does it cost more to use a 100-W light bulb for a 60-W light bulb? www.assignmentpoint.com

It is illegal to tamper with it!!! This meter can usually be found outside our home. It keeps track of the amount of electrical power that your home uses over time. It is illegal to tamper with it!!! www.assignmentpoint.com

Where does electricity come from? www.assignmentpoint.com

Electricity is not entirely efficient. www.assignmentpoint.com