Question
A length of metal wire is used as a resistor in a circuit.
Which change to the wire results in an increase in current in the circuit?
A. connecting a second identical length of wire in parallel with the original wire
B. connecting a second identical length of wire in series with the original wire
C. decreasing the thickness of the wire
D. increasing the length of the wire
Answer/Explanation
Ans: A
Question
The circuit diagram shows a cell connected to an ammeter and two resistors.
What is the current in the circuit?
A 0.75 A B 1.3 A C 12 A D 48 A
Answer/Explanation
Ans: A
Question
Which particles move in a metal to cause an electric current?
electrons
neutrons
nucleons
protons
Answer/Explanation
Ans: A
Question
The circuit shows a 2.0 Ω resistor and a 1.0 Ω resistor connected to a 12 V battery.
What is the current in the 2.0 Ω resistor?
A 4.0 A
B 6.0 A
C 24 A
D 36 A
Answer/Explanation
Ans: A