Vocabulary
A property of matter that lets an object exert a force of repulsion or attraction on other objects that are near but not necessarily touching
What is electric charge?
Most objects are electrically ________.
What is neutral?
This part of an electric circuit creates the connection between the voltage source and the electrical device
What is a conductor?
A current of 5 amps flows through a 60 W incandescent light bulb and the voltage difference is 50 V. What is the resistance of the filament?
What is 10 Ω ?
(R = V / I = 50 V / 5 A)
Electrons travel from high voltage regions to low voltage regions.
What is true?
A substance that does not allow electricity to flow through it easily
What is an insulator?
Metals are good __________ because they do not hold tightly to their valence electrons.
What are conductors?
The two properties that determine an electric current
What are resistance and voltage?
An electric conductor that conducts current into and out of an electrolyte
What is an electrode?
Dry cells are considered dry because the electrolyte is a moist paste and not a liquid solution.
What is true?
The net flow of electrons
What is electric current?
A stationary electric charge that is caused by the imbalance of positive and negative charges
What is static electricity?
a mixture of chemicals that conducts an electric current
What is electrolyte?
What 3 things are necessary for electricity to flow in a circuit?
Voltage, conductor (wire), resistor (light bulb, ect)
Metals are good conductors because they hold tightly to their valence electrons.
What is false? Metals are good conductors because they do not hold tightly to their valence electrons.
What is a conductor?
A material that allows charges to flow though it
The particles that are transferred when an uncharged object becomes charged
What are electrons?
What type of circuit has more than one path of flow.
Parallel Circuit
How thickness and length affect a wire’s resistance.
What is thicker, shorter wires allowing more current to flow through?
If resistance stays the same, an increased current indicates a decreased voltage.
What is false? If resistance stays the same, an increased current indicates an increased voltage.
The opposition to the flow of an electric charge
What is resistance?
This part of a dry cell battery is responsible for the transport of electric charges
What is an elecrolyte?
The main difference between a series circuit and a parallel circuit
Series circuits create only one path for the flow of electricity. Parallel circuits contain multiple branches that create several paths for the flow of electricity.
If part of an electric circuit dissipates energy at 120 W when it draws a current of 10 A, what voltage is impressed across it?
What is 0.012 V?
V = P ÷ I = 0.12 kW ÷ 10 A = 0.012 V
The greatest force exerted by a charged particle is located in the region of the electric field that is farthest away from the charged particle.
What is false? The greatest force exerted by a charged particle is located in the region of the electric field that is closest to the charged particle.