NAME: ________________________

# ← ElectricityTest

### Question Limit

of 23 available terms

### 5 Matching Questions

1. What are the two things that play into the brightness of a bulb?
2. In a circuit, where is the voltage higher? Where is the voltage lower?
3. Current Meter
4. Kirchoff's Voltage Law
5. Which way does current flow?
1. a Current and Voltage
2. b The total of all the potential differences around a closed path of a circuit must be equal to zero.
3. c From the positive terminal to the negative terminal; opposite the flow of electrons.
4. d Definition: A mechanism that measures the current through a given portion of wire.
Units used: Amperes
5. e The voltage is higher near the positive terminal, while it is lower near the negative terminal.

### 5 Multiple Choice Questions

1. Extend the limitations of the wire by placing capacitors, or make the gap smaller.
2. From the negative terminal, to the positive terminal-- because, as they are negatively charged, they are attracted to the positive terminal. Furthermore, at the negative terminal they have more EPE than at the positive terminal-- the more distanced they are from the place "where they want to be", the more EPE they have.
3. The flowing of charges (current) in one direction in a circuit.
4. A switch that automatically interrupts or shuts off an electric circuit at the first indication of an overload of current.
5. A line of wire designed to melt and separate in the event of excessive current, protecting the rest of the circuit from potential problems due to the amount of energy.

### 5 True/False Questions

1. What is the formula for electrical power? What are the units?Formula: Power=Work/Time or Power=Change in Energy/Time
Unit: Watt

2. CurrentDefinition: A measure of the amount of electrical charge transferred per a given unit of time.
Unit: Coulombs/Second=Amperes

3. ResistanceDefinition: Resistance of a material to the flow of electric charge through it
Unit: Ohms

4. Kirchoff's Current LawThe current that enters into a branch is equal to the current that comes out of that same branch.

5. VoltageDefinition: The electrical potential energy per charge.
Unit: Joules/Coulomb=Volts