Electricity
What is the accumulation of excess electric charge on an object.
Static Electricity
In a simple electric circuit, a 24-ohm resistor is connected across a 6.0-volt battery. What is the current in the circuit? (need the unit also)
0.25 A
What are the ends of a magnet called?
Poles or magnetic poles
Which circuit has only one path for the current to follow?
Series circuit
Electric charge can be measured in
Coulombs
Name the 3 subatomic particles AND their charges
Proton (+), Electron (-), Neutron (no charge)
Fill in the blanks: Current always moves from a ________ voltage to a __________ voltage
High, Low
In a simple electric circuit, a 110-volt electric heater draws 2.0 amperes of current. The resistance of the heater is
55 ohms
What happens when two like poles of a magnet are brought near each other?
They repel
What type of circuit does not allow current to flow?
What is the unit for voltage?
volts
Negative charges exert a force _______________ while positive charges exert a force ______________
inwards, outwards
What states that voltage across a conductor is directly proportional to the current flowing through it
Ohm's Law
A small flashlight has a current of 0.15 amperes flowing through a bulb with a resistance of 20 ohms. What is the voltage across the bulb?
3 v
What is the region around a magnet where magnetic forces can be detected?
Magnetic field
What happens to a series circuit if one bulb goes out?
The whole circuit stops working
What is the unit and unit symbol for current?
Amperes (A) or Amps (A)
What is the name for materials that allow electricity to flow easily. Include an example
Conductors (any type of metal)
All objects want to be electrically neutral. Explain how they do this.
They discharge their electrons/negative charges elsewhere
What is the current in a 100.-ohm resistor connected to a 0.40-volt source of potential difference?
0.004 A
Energy flows from the ____________ pole to the _____________ pole
north, south
What is the power source for a circuit
battery
Resistance is measured in
ohms
What is the rate at which electrical energy is converted into other forms?
Power
Explain the difference between conduction and induction
Conduction is the transfer of charges between objects that are touching. Induction is the transfer of charges between objects near each other
A circuit contains a resistor with a resistance of 480 ohms, and a current of 2.75 amperes flows through it. What is the potential difference across the resistor?
1320 v
What is a temporary magnet made by wrapping wire around a core and running current through it?
Electromagnet
Draw the symbols for: battery, light bulb, switch, wire and resistor. (need all correct for points)
I will draw on board.
What is the unit symbol for potential difference?
v
The magnetic force exerted by a magnet is strongest at
The poles