Physical Science Chapters 6 and 7
A
A __________ attracts iron objects. A) Magnet B) Commutator C) Motor D) Generator
B
A __________ is described as a device with specific resistance and is used to control current. A) Battery B) Resistor C) Parallel connection D) Series connection
D
A car battery is a type of __________. A) Circuit B) Resistor C) Dry cell battery D) Wet cell battery
B
A closed path in which electric current flows is called a(n) __________. A) Dry cell battery B) Electric circuit C) Resistor D) Wet cell battery
A
A device that increases or decreases voltage in a power line is called a __________. A) Transformer B) Motor C) Generator D) Commutator
A
A device that uses an electromagnet to measure electric current is a(n) __________. A) Galvanometer B) Commutator C) Electric motor D) Generator
B
A dry-cell battery produces __________. A) An alternating current B) A direct current C) The same current that a generator produces D) Both direct and alternating current
A
A flashlight is an example of this type of circuit. A) Series B) Parallel C) AC D) Short
C
A magnetic field exerts a force on __________. A) Other magnets B) Objects made of magnetic materials C) Both A and B D) Neither A nor B
B
A transformer that decreases voltage is a __________. A) Resistance transformer B) Step-down transformer C) Step-up transformer D) Voltage motor
A
A transformer that increases voltage is a __________. A) Step-up transformer B) Step-down transformer C) Resistance transformer D) Voltage motor
B
A(n) __________ is an energy unit used to measure electric energy use by power companies. A) Ampere B) Kilowatt-hour C) Ohm D) Volt
C
A/An __________ is described as the flow of charged particles. A) Electric field B) Electric potential difference C) Electric current D) Gravitational force
D
An electromagnet is __________. A) A permanent magnet B) Made with bar magnets C) Attracts all metal substances D) Only operating when the current is on
B
Any battery operated device is an example of __________. A) Alternating current (AC) B) Direct current (DC)
A
Current that reverses direction in a regular pattern is called __________. A) Alternating current B) Circuit current C) Direct current D) Magnetic current
A
Electromagnetic induction is the process of producing an electric current by moving a loop of wire __________. A) Through a magnetic field B) Through a transformer C) Around an iron core D) Up and down
C
Groups of atoms with aligned magnetic poles are called magnetic. A) Monopoles B) Regions C) Domains D) Fields
A
Hans Christian Oersted discovered that a moving electric current produces a __________. A) Magnetic field B) Resistance C) Positive charge D) Negative charge
B
In the United States, power lines can carry power voltages as high as 750,000 V, a step-down transformer reduces the voltage to __________ for home use. A) 60 V B) 120 V C) 60 Hz D) 120Hz
A
Objects that keep their magnetic properties for a long time are called __________. A) Permanent magnets B) Magnetic domains C) Electromagnets D) Temporary magnets
B
Resistance is measured in a unit called __________. A) Amperes B) Ohms C) Volts D) Coulombs
A
The accumulation of excess electric charge on an object is called __________. A) Static electricity B) Potential electricity C) Virtual electricity D) Fluid electricity
B
The domains in a magnet are __________. A) Arranged randomly B) Aligned according to magnetic fields C) Negatively charged D) Positively charged
C
The function of a generator is to __________. A) Change electrical energy to chemical energy B) Change chemical energy to electrical energy C) Change mechanical energy to electrical energy D) Change electrical energy to mechanical energy
C
The function of an electric motor is to change __________. A) Chemical energy to electrical energy B) Electrical energy to chemical energy C) Electrical energy to mechanical energy D) Mechanical energy to electrical energy
C
The magnetic field of a magnet is __________. A) The same at all parts of the magnet B) Strongest at the center C) Strongest at the poles D) Weakest at the poles
B
The rate at which an electrical device converts energy from one form to another is called __________. A) Electrical energy B) Electrical power C) Electrical resistance D) Voltage regulation
A
The region around a magnet where the magnetic forces act is the __________. A) Magnetic field B) Magnetic domain C) Magnetic pole D) Electromagnetic
C
The south pole of a magnet __________. A) Attracts another south pole B) Repels a paper clip C) Attracts a north pole D) Repels a north pole
C
The standard wall outlet in the USA has a voltage difference of __________. A) 240V B) 100V C) 120V D) 200V
A
The statement, current is equal to the voltage difference divided by the resistance, is known as __________. A) Ohm's law B) Newton's law C) Einstein's equation D) Faraday's law
B
The strength of magnetic force in an electromagnet is __________ by increasing the current through the coil. A) Decreased B) Increased C) Unaffected D) Eliminated
B
The total resistance in a series circuit can be found by __________. A) Multiplying each individual resistor B) Adding each individual resistor value C) Using the middle resistor value in the circuit D) Guessing
A
This device can detect an electric charge. A) Electroscope B) Battery C) Resistor D) Toaster
D
This safety device includes a switch that automatically stops the flow of current. A) Fuse B) Ohmmeter C) Battery D) Circuit breaker
B
This safety device works by using a thin piece of metal which melts if exposed to high current. A) Circuit breaker B) Fuse C) Resistor D) Battery
D
This type of circuit configuration is used in homes. A) Series B) Short C) Open D) Parallel
B
This type of circuit contains two or more branches for current to flow. A) Series B) Parallel C) Open D) Short
B
Two objects will attract one another when they have __________. A) Like charges B) Opposite charges C) The same amount of charge D) No charge
C
When you break an iron magnet into two pieces, you get __________. A) Two north poles B) Two south poles C) Two north poles and two south poles D) A piece of iron that is no longer magnetic
A
Which is a good electrical conductor? A) Metal B) Glass C) Wood D) Plastic
A
Your phone charger uses __________ when you plug it into a wall outlet. A) Alternating current (AC) B) Direct current (DC)
A
__________ charges repel, whereas __________ charges attract. A) Like, opposite B) Opposite, like C) Positive, negative D) Negative, positive
A
__________ forces between charges are enormous in comparison to __________ forces. A) Electrical, gravitational B) Gravitational, electrical C) Positive, negative D) Negative, positive
B
__________ is the process of generating an electric current by a changing magnetic field. A) Generation B) Electromagnetic induction C) Electromagnetic deduction D) Magnetic charging
