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WorksheetsCurrent voltage and resistance
Total questions: 22
Worksheet time: 18mins
The table describes four different resistance wires.
They are all made from the same metal.
Which wire has the smallest resistance?
A
B
C
D
Which symbols are used for the units of current and of resistance?
A
B
C
D
The resistance of a component in a circuit is found using an ammeter and a voltmeter.
How are the ammeter and the voltmeter connected?
the voltmeter and ammeter in parallel with the component
the voltmeter and ammeter in series with the component
the voltmeter in parallel with the component and the ammeter in series with the component
the voltmeter in series with the component and the ammeter in parallel with the component
A student uses a length of wire as a resistor. He makes a second resistor from the same material.
To be certain of making a second resistor of higher resistance, he should use a piece of wire that is:
longer and thicker.
longer and thinner.
shorter and thicker.
shorter and thinner.
What is the current in an electric circuit?
The energy of the circuit
The flow of electrons in the circuit
The power of the circuit
Resistivity, the inverse of conductivity, is only dependent on which of the following? (choose one)
shape of the wire
length of the wire
cross-sectional area of the wire
type of metal
Which of the following aluminum wires would have the greatest resistance?
3 cm in length and 2 cm in diameter
6 cm in length and 2 cm in diameter
9 cm in length and 2 cm in diameter
12 cm in length and 2 cm in diameter
Which of the following statements are true?
Voltage will not exist without any current
Batteries are the source charges in a current
Currents will not exist without any voltage
Current travels through wires near light speeds
How will increasing the amount of resistance in a circuit affect the current if the voltage remains constant?
It will increase
It will not change
It will decrease
It will cease
When the charges move through a circuit in one direction this type of current is called…
Alternating Current
Breaking Current
Circulating Current
Direct Current
What is the role of an ammeter in an electric circuit?
To measure the amount of electric current in the circuit
To measure the amount of voltage in an electric circuit
To measure the amount of resistance in an electric circuit
What is the role of a voltmeter in an electric circuit?
To measure the amount of current
To measure the voltage in an electric circuit
To measure the energy of the current
