27. Resistors & DC Circuits

Intro to Current

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Intro to Current: In basic circuit terminology, any device that uses electric current to perform work (such as converting electrical energy to light, heat, or motion) is called a:
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Which of the following terms best describes an electrical current ( $I$ )?
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A circuit consists of a battery with emf $𝐸$ and two resistors, $R = 2 Ω$ and $R = 4 Ω$ , connected in series. If the emf of the battery is $12 V$ , what is the current through the battery?
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In an introductory DC circuit, which type of circuit prevents the flow of current because the conducting path is broken?
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A wire delivers $12.0 C$ of charge in $4.0 s$ . What is the current in the wire?
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In introductory circuit analysis, which American Wire Gauge (AWG) wire can typically carry the most current (assuming the same material and similar insulation/ambient conditions)?
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In a series $L C$ circuit, which of the following statements about the electric current is correct?
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In introductory electricity, what term describes the complete closed path along which an electric current flows?
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A lightning bolt hits the ground carrying a current of 3 × 10⁴ A. If the strike lasts 50 ms, how much charge enters the ground?
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A simple circuit consists of a $12 V$ battery connected in series with a $4 Ω$ resistor. What is the current in this circuit?
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A total of $600 C$ of charge passes through a flashlight in $0.500 h$ . What is the average current?
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In an introductory circuits context, which device restricts electric current flow to a single direction?
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If the voltage across a circuit remains constant ( $V =constant$ ), how does the current ( $I$ ) change when the resistance ( $R$ ) is doubled?
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Topic: Intro to Current. Two cylindrical copper wires have the same length but different diameters. Wire A has diameter $d_{A}$ and Wire B has diameter $d_{B}$ , with $d_{B} > d_{A}$ . If the same potential difference $V$ is applied across each wire, which wire can carry the higher current?
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In introductory electricity, what SI unit is used to measure the strength of an electric current?
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