Here are the answers to the questions you provided:
- Just as electric charges, opposite poles in magnets attract each other.
- Match with the correct unit of measure: SI unit of current = 1 C/s → ampere
- Choose the best answer: An electrical circuit is opened when a _____ senses an overloaded circuit. → circuit breaker
- Match with the correct unit of measure: Unit of electrical resistance = resistance between two points of a conductor when a constant potential difference of 1 volt, applied to these points, produces a current of 1 ampere in the conductor → ohm
- Choose the best answer: One light bulb in a set of Christmas lights goes out and the entire set quits working because the light bulbs are in a(n) _____ circuit. → series
- Choose the best answer: If the switch in an electrical circuit is turned OFF in a lamp's circuit, the circuit is _____ and the charges are not running through the circuit. → opened
- Match with the correct unit of measure: SI Unit of capacitance the charge in coulomb that a capacitor will accept for the potential across it to change 1 volt → farad
- Choose the best answer: Explain why high voltage power lines are more efficient than lower voltage lines carrying the same power. → The I²R losses are less because the current is less for the same amount of power.
- Choose the best answer: When current flows from a battery's positive terminal, through the circuit, and then back to the battery's negative terminal, that is _____. → direct current
- Choose the best answer: If a machine utilized 1,502 watts and the current that ran through it was 14 amperes, what voltage was applied? → 107 V (Since Power = Voltage × Current → V = Power / Current = 1502 W / 14 A)
- Choose the best answer: One pole's attraction for another on a magnet creates lines of _____ between the poles. → force
- Match with the correct unit of measure: Unit of electric potential 1 joule of energy per coulomb of charge, J/C → volt
- Match with the correct unit of measure: SI unit of electric charge; the amount of electric charge by a current of one amp in 1 second. → coulomb
- Choose the best answer: Ohm's law is written as _____. → V = I × R (Voltage = Current × Resistance)
- Choose the best answer: What units are used to measure an electrical system's current? → amperes (amps)
- Choose the best answer: Since a magnet has a north and a south pole it is _____. → dipolar
- Choose the best answer: Conventional current flows _____. → from positive to negative
- Choose the best answer: The amount of power delivered by a circuit carrying one ampere of current with a one-volt difference in one second is measured in watts and is called ____. → electric power
- Choose the best answer: To limit a current by impeding the flow of charges, _____ are installed. → resistors
- Choose the best answer: A system's resistance is measured in _____. → ohms
- Choose the best answer: A conductor has low _____ while an insulator has high resistance. → resistance
- Choose the best answer: The rate at which electric _____ move through a conductor is the current. → charges
- Choose the best answer: Certain _____ are better conductors than others. → metals
- Choose the best answer: If you want a material that an electric current can go through, you use a(n) _____. → conductor
- Choose the best answer: A protective device called a ______ has a conductor that burns through if a circuit is overloaded. → fuse
- Choose the best answer: If too many appliances are attached to one electric circuit you risk overloading the circuit due to _____. → excess current
- Match with the correct unit of measure: Unit of power = 1 joule per second → watt
- Choose the best answer: Four electrical components in a(n) _____ circuit possess four different complete circuits. → parallel
- Choose the best answer: If the switch in an electrical circuit is turned ON in an electric train's circuit, the circuit is _____ and the charges are running through the circuit. → closed
- Choose the best answer: A material that resists an electric current from passing through it is a(n) _____. → insulator
- Choose the best answer: When the electric potential in a generator shifts back and forth _____ is created. → alternating current
- Choose the best answer: To measure a system's electrical potential you use _____. → volts
- Choose the best answer: A circuit's _____ is affected by the material type, the conducting wire's length and width, the temperature of the materials in the circuit, plus the components that are added to the circuit. → resistance
Feel free to ask if you have more questions or need further explanations!