Physics 22-23

(T/F) An ampere is a unit used by electric companies to measure electrical energy use

false, a kilowatt hour is used

(T/F) electric energy is transferred from generating stations to consumers premises at extremely low voltage

false, extremely high

(T/F) a series connection is a type of electric circuit in which there are multiple current path

false, single parts

A __________ is described as a piece of metal that acts as a safety device in a circuit which melts and stops the flow of current

fuse

a short piece of metal melts when a large current passes through it is a

fuse

A __________ is described as a device that detects current differences and then opens the circuit preventing electrocution

ground fault interrupter

if a resistor is added to a s series circuit, the equivalent resistance;

increases

A ___________ is an energy unit used to measure electric energy used by power companies

kilowatt-hour

A ____________ is equal to 1000 watts delivered continuously for 3,600 seconds

kilowatt-hour

the number of current paths in a series circuit is

one

A __________ is described as a type of circuit in which there are several current paths

parallel circuit

A__________ is a type of electric circuit in which there are multiple paths whereas a ________ is a type of electric circuit in which there is a single current path

parallel connection, series connection

_______________is described as a property that determines how much current will flow for a given battery voltage

resistance

A __________ is described as a device with specific resistance and is used to control current

resistor

A __________ is described as a device with specific resistance and is used to control current whereas a __________ converts chemical energy to electrical energy

resistor, battery

A __________ is described as a type of circuit in which there is only a single current path

series circuit

A _______ is a type of electric circuit in which there is a single current path

series connection

A _______ occurs when a very low resistance circuit is formed and can easily start a fire

short circuit

In the circuit below the ammeter shows that there is a current. however the bu,lb does not light because...

the variable resistance has a large value

(T/F) A circuit breaker is an automatic switch that opens when the current reaches a threshold value

true

(T/F) A circuit which includes series and parallel branches is called a combined series parallel circuit

true

(T/F) A ground-fault interrupter in an electric outlet prevents injuries because it contains an electronic circuit that detects differences in current caused by an extra path and opens the circuit

true

(T/F) A parallel connection is type of electric current in which there are multiple current paths

true

(T/F) A short circuit occurs when a circuit with a very low resistance is formed

true

(T/F) Arc fault circuit interrupters use electronic detectors to respond to the electric signals associated with arcing; the can shut down a circuit in many cases where a circuit breaker would react

true

(T/F) As currents move through any circuit, the net change in potential must be zero

true

(T/F) Circuit breakers are connected in series so that the circuit will open in case of dangerously high current

true

(T/F) Fuses and circuit breakers protect against the large currents caused by a short circuit

true

(T/F) In order to measure the current through a resistor, an ammeter is placed in series with the resistor

true

(T/F) Resistance is a property that determines how much current will flow in a circuit

true

(T/F) The cables used to transfer electric energy from the generating station to the consumers must be of low resistance to reduce losses due to joule heating

true

(T/F) To measure the potential drop across a resistor, a voltmeter is connected in parallel with a resistor

true

(T/F) Voltage dividers are often used with sensors, such as photosensors

true

(T/F) Voltmeters are designed to have a very high resistance so as to cause the smallest possible change in currents and voltages in the circuit

true

(T/F) an electric circuit is a closed loop or pathway that allows electric charges to flow

true

(T/F) an electric current is a flow of charged particles

true

(T/F) it is necessary to understand series and parallel circuits to fully understand residential wrong

true

(T/F) the flow of electric charge or current that is equal to one coulomb per second is an ampere

true

A __________ is described as a series circuit that is used to produce a lower voltage from a higher voltage battery

voltage divider

A __________ is described as a device that is used to measure voltage drop across any part of a circuit

voltmeter

A __________ is used to measure the voltage drop across a portion of a circuit

voltmeter

(T/F) Ammeters have a very high resistance so as to cause the smallest possible change in currents and voltages in the circuit

FALSE, ammeters have a very low resistance

(T/F) One kilowatt-hour is equal to the energy consumed by electronic device for 1 watt per 1 hour

FALSE... its one kilowatt

(T/F) A circuit breaker is a short piece of metal that melts when a current that is too large passes through it

FALSE; a fuse is a short piece....

A __________ is a device that is used to measure the current in any branch or part of a circuit

ammeter

A __________ is described as a low resistance device connected in series that is used to measure current

ammeter

which device measures the current in a circuit

ammeter

A __________ is described as the flow of electric charge or current equal to one coulomb per second

ampere

The flow of electric charge or current equal to one coulomb per second is an __________

ampere

A _________ is described as a device that converts chemical energy to electric energy

battery

A __________ is described as an automatic switch that acts as a safeguard in an electric current

circuit breaker

An automatic switch that opens when the current reaches a set value is called

circuit breaker

A _____________is described as the flow of positive charged that move from a higher to lower potential energy

conventional current

In a series circuit, each circuit element has the same

current

if a resistor is added to a parallel circuit, the equivalent resistance

decreases

A __________ is described as a closed loop or pathway that allows electric charges to flow

electric circuit

a _________ is described as a closed loop or pathway that allows electric charges to flow, whereas a _________ is described as a flow of charged particles

electric circuit, electric current

A __________ is described as a flow of charged particles

electric current

A __________ is described as the flow of charged particles

electric current