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Worksheets(Savvas 20.2) Ch. 20.2 Electric Current
Total questions: 20
Worksheet time: 18mins
The potential differences in a battery cause electrons flow from a(n) ______ terminal to a(n) ______ terminal.
positive to negative
negative to positive
neutral to ground
ground to neutral
Metals are good conductors because they do not have freely moving electrons.
True
False
Match the SI unit to the property of electricity.
volt
potential difference
ampere
electric current
ohm
resistance
Which wire has the lowest resistance?
a short thin wire
a short thick wire
a long thick wire
a long thin wire
Which answer best describes the voltage of a battery?
how long it will last for
how strongly it can push the current
how fast the current will be
how large the battery is
An electrical circuit has a 12 volt battery and the resistor is 4 ohms. How many amps are running through the circuit?
3 amps
48 amps
16 amps
8 amps
An electric current that continually reverses direction over time is known as a(n)
fluctuating current
direct current
alternating current
simple current
An electric current flowing in one direction only
fluctuating current
direct current
alternating current
simple current
What does this symbol represent?
What is the potential difference of a battery in a circuit that has a resistance of 10 ohms and a current of 2 amps?
8 volts
5 volts
20 volts
12 volts
A material that will allow a flow of current through it with very low resistance is called a(n)
insulator.
conductor.
semiconductor.
If the resistance increases two times, while the voltage remains constant,
the current will decrease two times.
the current will also increase two times.
the current will remain constant.
A battery is a device that converts
chemical energy to electrical energy.
electrical energy to mechanical energy.
mechanical energy to electrical energy.
electrical energy to chemical energy.
The resistance of a piece of wire does NOT depend on _________________.
wire temperature
wire mass
wire length
wire thickness (cross sectional area)
What happens to materials that can become superconductors at low temperatures?
They have increased resistance
They have no resistance
They become insulators
They conduct heat better
What is the effect of resistance on electrical energy?
It stores electrical energy
It amplifies electrical energy
It changes electrical energy into thermal energy
It reduces electrical energy to zero
In Ohm's Law, what does 'I' represent?
Voltage
Current
Resistance
Power
what 'pushes' electrons.
what 'stops' electrons.
rate at which the electrons move.
The plastic covering around a wire is there to
provide a conductor for electrical energy to flow.
provide an insulator so that electrical energy will not pass outside of the wires.
provide a conductor so that electrical energy can NOT flow.
provide an insulator so that electrical energy can flow.
