Site MapHelpFeedbackSection 11.4
Section 11.4
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1
When using Ohm’s Law, which of the following formulae would be most efficient for calculating potential difference?
A)V = I x R
B)R = V / I
C)I = V / R
D)V = I / R
2
What is the potential difference when a current of 15 amps flows through a resistor of 10 ohms?
A)0.66 V
B)1.5 V
C)15 V
D)150 V
3
Which of the following situations would increase the electrical resistance of a circuit consisting of iron wires?
A)decrease the length of the copper wire
B)increase the temperature
C)increase the thickness of the wire
D)change the wiring to copper
4
A material that allows electrons to flow through with no resistance is called a(n)…
A)conductor.
B)insulator.
C)superconductor
D)non-ohmic conductor.
5
An electric kettle that draws 12A when plugged into a 120 V source has an element with a resistance of…
A)0.1 ohms.
B)10 ohms.
C)1200 ohms.
D)1440 ohms.





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