* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Circuits Test #2 - Review
Power electronics wikipedia , lookup
Nanofluidic circuitry wikipedia , lookup
Flexible electronics wikipedia , lookup
Lumped element model wikipedia , lookup
Integrated circuit wikipedia , lookup
Negative resistance wikipedia , lookup
Valve RF amplifier wikipedia , lookup
Schmitt trigger wikipedia , lookup
Operational amplifier wikipedia , lookup
Switched-mode power supply wikipedia , lookup
Regenerative circuit wikipedia , lookup
Power MOSFET wikipedia , lookup
Index of electronics articles wikipedia , lookup
Two-port network wikipedia , lookup
Electrical ballast wikipedia , lookup
Surge protector wikipedia , lookup
Current source wikipedia , lookup
Rectiverter wikipedia , lookup
Resistive opto-isolator wikipedia , lookup
Current mirror wikipedia , lookup
Opto-isolator wikipedia , lookup
RLC circuit wikipedia , lookup
Circuits Test #2 - Review Vocabulary Matching: __D__ 1. Resistance A. The rate of flow of electricity through a circuit __F__ 2. Voltage B. A material that allows the flow of electricity __A__ 3. Current C. Electricity can flow through this circuit __B__ 4. Conductor D. Slows down the flow of electricity in a circuit __E__ 5. Insulator E. A material that resists electrical flow __G__ 6. Schematic Diagram F. Pushes electricity through a circuit __H__ 7. Open Circuit G. A shorthand way to draw an electrical circuit __C__ 8. Closed Circuit H. A circuit with a break in it, electricity will not flow Parts of a Circuit: __E__ 9. Battery A. Slows down the flow of electricity in a circuit __C__ 10. Wires B. Can turn the electricity on and off in a circuit __B__ 11. Switch C. Connects the parts of the circuit together __D__ 12. Light Bulb D. Used to create radiant energy __A__ 13. Resistor E. Pushes electricity through the circuit Ohm’s Law: __E__ 14. Amperes A. Unit of electrical resistance __G__ 15. Volts B. Symbol for electrical resistance __A__ 16. Ohms C. Symbol used to represent current in Ohm’s formula __D__ 17. V D. Symbol for electrical potential or voltage __B__ 18. Ω E. Unit of electrical current __F__ 19. A F. Symbol for electrical current __C__ 20. I G. Unit of electrical potential or voltage Ohm’s Law Problems: 21. How much voltage is needed to produce 2 A through a 4 Ω light bulb? V = IR = (2A) (4Ω) = 8V 22. A 9 volt battery produces 4.5 amps across a resistor. What is the resistance? R = V/I = (9V)/(4.5A) = 2Ω 23. If a light in your house (120V) draws 0.5 amps, how much resistance is in the bulb? R = V/I = (120V)/(0.5A) = 240Ω 24. If a light bulb uses 6V and has a resistance of 12Ω, what is the current it draws? I = V/R = (6V)(12Ω) = 0.5A Fill-in-the-Blanks: 25. Ohm’s Law states “For a given resistor at a particular temperature, the current is directly proportional to the applied voltage.” 26. According to Ohm’s Law, resistance and current are inversely proportional. 27. In a series circuit there is only one path for the current to flow. The current is the same at all points along the wire and the resistance increases as resistors are added. 28. In a parallel circuit there are multiple paths for the current to flow. Each resistor provides a new path for electrons to flow and the voltage across each branch is equal to the voltage of the source. **29. As resistors are added to a series circuit, the resistance increases and the current decreases. **30. As resistors are added to a parallel circuit, the resistance decreases and the current increases. Draw the following diagrams using circuit symbols: 31. A circuit with a battery, a switch and 2 light bulbs in parallel. 32. A circuit with a battery, a switch and 2 resistors in series. Circuit Diagrams: For each diagram, complete the table and fill in the blanks. 33. VT = ___9___ V RT = ___18___ Ω IT = __0.5___ A Series Circuit Resistance Current Voltage (Ω) (A) (V) 10 0.5 5 5 0.5 2.5 3 0.5 1.5 I = V/R = 9/18 34. VT = ___6___ V RT = ___2.0___ Ω IT = ___3___ A Parallel Circuit Resistance Current Voltage (Ω) (A) (V) 6 1 6 3 2 6 35. 1/RT = 1/6 + 1/3 = 0.1667 + 0.333 = 0.4997 RT = 1/0.4997 VT = ___12___ V IT = ___1.33___ A RT = ___9___ Ω Series Circuit Resistance Current Voltage (Ω) (A) (V) 2 1.33 2.66 3 1.33 3.99 4 1.33 5.32 I = V/R = 12/9 36. VT = __4.5___ V RT = __0.55___ Ω IT = __8.25___ A Parallel Circuit Resistance Current Voltage (Ω) (A) (V) 2 2.25 4.5 3 1.5 4.5 1 4.5 4.5 1/RT = ½ + 1/3 + 1 = 0.5 + 0.333 + 1 = 1.833 37. VT = ___6___ V RT = ___2.0___ Ω RT = 1/1.833 IT = ___3___ A Parallel Circuit Resistance Current Voltage (Ω) (A) (V) 4 1.5 6 6 1 6 12 0.5 6 1/RT = ¼ + 1/6 + 1/12 = 0.25 + 0.1667 + 0.0833 = 0.5 RT = 1/0.5