Rate at which electrical energy is changed to another energy form
What is electrical power
100
The statement current is equal to voltage difference divided by resistance represents
What is ohm's law
100
Circuit with more than one path
What is Parallel circuit
100
electric charge that has accumulated on an object is referred to as
What is static electricity
100
A device that is used to increase or decrease voltage is a(an) _________.
What is transformer
200
Device that detects electric current
What is ammeter
200
A TV that requires an average of 0.40 amps of current is operated on a 120 V service for 5.0 hours. How much energy is used?
a. 1.5 kWh b. 0.15kWh c. 0.24 kWh d. 0.67 kWh
What is 0.24 KWh
200
Circuit with only one path
What is series circuit
200
Static discharge differs from electric current in that static discharge
a. is a flow of electrons
b. lasts for only a few seconds
c. results because a force is exerted on the electrons
What is b
200
The location of the strongest magnetic forces on a magnet are the
a. magnetic fields b. magnetic domains
c. magnetic poles d. electromagnets
What is magnetic poles
300
A flash light uses this type of current _______
Alternating or Direct Current
What is Direct Current (DC)
300
If a current flowing through a lightbulb is 0.75 amperes and the voltage is 120 volts, how much resistance does the light bulb have?
What is 160 ohms
300
Which of the following devices is designed to open an overloaded circuit?
a. transformer b. magnet c. resistor d. circuit breaker
What is circuit breaker
300
Lightning is ____.
a. a very large discharge of static electricity.
b. a buildup of neutrons
c. a low voltage electric current d. harmless
What is a.
300
Objects that keep their magnetic properties for a long time are called
a. permanent magnets b. electromagnets
c. magnetic domains d. temporary magnets
What is permanent magnets
400
Push that causes charges to move
What is voltage
400
If a step up transformer has 4 turns in its primary coil and 8 coils in its secondary coil and 120 volts are coming into the transformer, how many will exit the transformer?
What is 240 Volts
400
Suppose you had a string of lights how would you determine if they were wired in parallel or series
What is Take one bulb out, if they all go out it is series.
400
The instrument used to detect static electricity charge is called a (an)
A. voltmeter
b. ammeter
c. electroscope
What is electroscope
400
The function of an electric motor is to
a. change electrical energy to chemical energy
b. change electrical energy to mechanical
c. change mechanical energy to electrical
What is b.
500
Tendency of a material to oppose the flow of electrons
What is resistance
500
In a series circuit with 2 bulbs with 1 ohms resistance each, and a 3 volt battery, what is the current in the circuit?
What is 1.5 amps
500
Which type of circuit has the same current througout?
parallel or series
What is series
500
Why is there little static electricity in the summer?
a. No electrons can be removed by friction
b. Electrons that are removed are taken up by water in the air.
c. The statement is false.
What is b.
500
Groups of atoms with aligned magnetic poles are called
a. magnetic current b. magnetic poles
c. magnetic domains d. magnetic fields