WorksheetsPhysics Unit 5 Quiz 3
Total questions: 20
Worksheet time: 10mins
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.
undisturbed
open
closed
incomplete
A conductor has low _____ while an insulator has high resistance.
resistance
density
conductivity
flammability
A material that resists an electric current from passing through it is a(n) _____.
insulator
capacitor
magnetic field
conductor
To limit a current by impeding the flow of charges, _____ are installed.
resistors
charges
insulators
metals
If too many appliances are attached to one electric circuit you risk overloading the circuit due to _____.
excess electric potential
excess voltage
excess current
excess resistance
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.
direct
series
parallel
alternate
When current flows from a battery's positive terminal, through the circuit, and then back to the battery's negative terminal, that is _____.
a dielectric
alternating current
direct current
a diode
What is the SI Unit of capacitance: the charge in coulomb that a capacitor will accept for the potential across it to change 1 volt.
coulomb
joule
watt
farad
What is the unit of power = 1 joule per second?
farad
ampere
joule
watt
To measure a system's electrical potential you use _____.
amperes (amps)
volts
watts
ohms
Certain _____ are better conductors than others.
metals
capacitors
magnetic fields
insulators
What is the SI unit of electric charge defined as the amount of electric charge by a current of one amp in 1 second.
watt
farad
ampere
coulomb
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 component that are added to the circuit.
resistance
color
density
size
Ohm's law is written as _____.
M=VD
V=IR
F=ma
W=fd
A system's resistance is measured in _____.
amperes (amps)
ohms
volts
watts
What units are used to measure an electrical system's current?
watts
volts
amperes (amps)
ohms
What is the name for derived SI unit of electric potential 1 joule of energy per coulomb of charge, J/C
watt
ohm
volt
coulomb
Since a magnet has a north and a south pole it is _____.
dipolar
polar
extrapolar
monopolar
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.
Copper can be used in transmission lines.
Power stations can be built larger.
Power losses are less because higher current can be used.
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
undisturbed
completed
closed
