Electric Current & Power

Learn electric current & power! Practice circuits, Ohm's Law, and energy calculations.

Matching A continuous flow of electric charges through a material electric current A complete, unbroken path through which electric charges can flow electric circuit The difference in electrical potential energy between two places in a circuit voltage The measure of how difficult it is for charges to flow through a material resistance A combination of two or more devices that transform chemical energy into electrical energy battery An electrochemical cell in which the electrolyte is a paste dry cell An electrochemical cell in which the electrolyte is a liquid wet cell Choose the correct term to complete the statement correctly. 1. A device used to measure electrical potential difference is a(n) voltmeter.2. A device used to open and close an electric circuit is a(n) switch.3. A(n) ammeter is connected in a series in an electric circuit in order to measure the current.4. A circuit is considered grounded when it can carry electric current from a short circuit directly to Earth.5. A connection allows current to take the path of least resistance is a short circuit.6. The severity of an electric shock depends upon the amount of current.7. The Italian physician, Galvani, studied anatomy and noticed a frog-leg twitching when touches with a hook to an iron filing.8. An Italian scientist, Volta, built the first electric battery.9. A(n) electrochemical cell is a device that transforms chemical energy into electrical energy.10. A reusable safety switch that breaks the circuit when the current gets too high is a circuit breaker.11. A disadvantage of using a fuse is it cannot be used again when it burns out.12. The effect of a current greater than .2 amp on a person's body would cause burns and could stop the heart. Labeling Label the symbols on the picture. Correct spelling required. At the bottom of the picture, tell what type of circuit it is. Use the word bank below.Ammeter Lightbulb Resistor Switch WireBattery Parallel Circuit Series Circuit Voltmeter Switch Battery Ammeter Lightbulb Wire Series Circuit Label the symbols on the picture. Correct spelling required. At the bottom of the picture, tell what type of circuit it is. Use the word bank below.Ammeter Lightbulb Resistor Switch WireBattery Parallel Circuit Series Circuit Voltmeter Wire Switch Lightbulb Lightbulb Parallel Circuit Sort the statements according to what is true about each type of circuit. Parallel Circuit The bulbs remain on when additional bulbs are added to the circuit. There is no change in the bulbs in the circuit when additional bulbs are added to the circuit. Current from each bulb has its own path. The resistance in the circuit decreases as more branches are added. A circuit has different parts on separate branches. Series Circuit When an additional bulb is added to the circuit, the other bulbs become dimmer. If the first bulb in the circuit is removed, the remaining bulbs will not light up. When a bulb burns out in the middle of the circuit, the bulb before it turns on but the one behind it doesn't. A circuit having a single path of flow. The rate at which appliances convert electrical energy into other forms of energy is electrical power. electrical energy. ohm's law. electric current. What is the commonly used unit for electrical energy? watts kilowatts kilowatts-hour watts-hour List 2 examples of voltage sources. What is the resistance of a light if the voltage is 18.0 volts and the current is .30 amps? If a household’s voltage is 120 volts, what is the power rating of a light bulb with 0.6 amps of current flowing through it? A coffee pot operates on 4 amperes of current on a 120-volt circuit for 3 hours. Calculate the total kWh used. What is the resistance of a lamp operating at 120 volts and using 0.75 amp of current? A clock radio has a power rating of 10 watts and uses a standard voltage of 110 volts. What is the current going to the radio?