← Electricity Test
5 Written Questions
5 Matching Questions
- What are the two things that play into the brightness of a bulb?
- In a circuit, where is the voltage higher? Where is the voltage lower?
- Current Meter
- Kirchoff's Voltage Law
- Which way does current flow?
- a Current and Voltage
- b The total of all the potential differences around a closed path of a circuit must be equal to zero.
- c From the positive terminal to the negative terminal; opposite the flow of electrons.
- d Definition: A mechanism that measures the current through a given portion of wire.
Units used: Amperes
- e The voltage is higher near the positive terminal, while it is lower near the negative terminal.
5 Multiple Choice Questions
- Extend the limitations of the wire by placing capacitors, or make the gap smaller.
- 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.
- The flowing of charges (current) in one direction in a circuit.
- A switch that automatically interrupts or shuts off an electric circuit at the first indication of an overload of current.
- 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
What is the formula for electrical power? What are the units? → Formula: Power=Work/Time or Power=Change in Energy/Time
Current → Definition: A measure of the amount of electrical charge transferred per a given unit of time.
Resistance → Definition: Resistance of a material to the flow of electric charge through it
Kirchoff's Current Law → The current that enters into a branch is equal to the current that comes out of that same branch.
Voltage → Definition: The electrical potential energy per charge.