WorksheetsAlternating Currents vs. Direct Currents
Total questions: 25
Worksheet time: 29mins
What is the difference between alternating and direct currents?
The charges of alternating currents change direction periodically while the charges of direct currents only flows in one direction.
The charges of alternating currents change direction periodically while the charges of direct currents change direction periodically.
The charges of alternating currents change direction periodically while the charges of direct currents change direction periodically.
The charges of alternating currents go off and on while the charges of direct currents only flows in one direction.
When a current switches back and forth at a normal speed, which of the following would NOT be true? Click all that apply.
It would be a direct current.
It would be a alternating current.
The current would be visibly flickering.
The current would be flickering, but would not be visible.
The current would eventually stop.
What do fuel cells, batteries, and solar cells have in common?
They are all sources of a cut current.
They are all sources of switching current.
They are all sources of an alternating current.
They are all sources of a direct current.
What can you infer about this current?
This is an alternating current.
This is a direct current.
This is both an alternating and a direct current.
This is neither an alternating nor a direct current.
What can you infer about this current?
This is an alternating current.
This is a direct current.
This is both an alternating and a direct current.
This is neither an alternating nor a direct current.
Which of the following statements is true about currents? Choose all that apply.
It is the flow of electrons through circuits.
There are only two types of electric currents: alternating and direct currents.
There are other types of electric currents besides alternating and direct currents.
Currents can be amplified by voltage.
What advantage does AC power have over DC power?
DC is practical to distribute at high voltage.
AC is practical to distribute at high voltage.
AC isn't practical to distribute at high voltage.
Which statement describes Nikola Tesla's legacy?
He helped replace DC power with AC power.
He helped replace AC power with DC power.
He helped replace DC power with DC power.
He helped replace AC power with AC power.
What are some advantages that DC has over AC? Choose all that apply.
Has a steady, constant voltage.
Is a pollutant.
True or False : Electricity travels from power plants to your house by transmission wires.
True
False
What do power generators do?
Changing electrical energy into mechanical energy
Changing mechanical energy into electrical energy.
Changing solar energy into electrical energy.
Place the following events in sequence: A) Voltage is increased by a transformer; B) Voltage is decreased by a transformer; C) Electrical current enters your home
(a)
What is electricity?
The flow of positive charge.
The flow of negative charge.
The flow of equal charge.
The flow of no charge.
When we are talking about convectional currents, we are talking about-
-the flow of positive charge (positive to negative) and not the movement of electrons themselves.
-the flow of positive charge (negative to positive) and not the movement of electrons themselves.
-the flow of electrons (positive to negative) and not the movement of the charge.
-the flow of electrons (negative to positive) and not the movement of the charge.
The potential energy for electricity is measured in:
Voltage (Volts) V
Amperes (Amps) I
Resistance (Ohms) R
Electric currents are measured in:
Voltage (Volts) V
Amperes (Amps) I
Resistance (Ohms) R
The friction of a substance against a current is called, and measured in:
Voltage (Volts) V
Amperes (Amps) I
Resistance (Ohms) R
What is the equation that shows the relationship between voltage, amperes, and resistance.
V=IR
V=AR
R=IV
I=RV
A circuit has resistance of 11 and a voltage of 99. What is the measurement of the amps?
9
900
0.9
90
A circuit has a voltage of 24 and amps of 4. What is the measurement of the resistance?
4
6
60
40
A circuit has the amps of 6 and the resistance of 8. What is the voltage?
48
42
1.3
0.75
What does this diagram show? Pay close attention to the light bulbs.
The electrocuting of elephants when new light bulbs are added.
The brightness of the light bulbs as light bulbs are added.
The brightness of the light bulbs as light bulbs are deleted.
The current of the circuit as light bulbs are added.
The beef between Tesla and Edison.
Say we add another battery to this circuit. What do you think will happen?
The voltage will increase.
The resistance will decrease.
The resistance will stay the same.
The current will increase.
The current will stay the same.
Say we add another light bulb to this circuit. What do you think will happen?
Resistance will increase.
Resistance will stay the same.
Voltage and current will remain constant.
Voltage will remain constant.
Current will decrease.
Say we add another pathway to this circuit. What do you think will happen?
When one bulb goes out the other will stay lit.
When one bulb goes out the other will go out.
Resistance is affected.
Resistance is unaffected.
Voltage and current will be the largest near the battery source.
