⚛️ Physics Quiz 18: Current, Resistance, and Circuits

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⚛️ Physics · Quiz 018

Use the voltage foundation from PHYS-017 to introduce current, resistance, and elementary DC network analysis.

Learning goalCalculate current and equivalent resistance in simple resistor circuits and interpret branch currents using Ohm's law and charge conservation.

  • 5 questions
  • Foundation
  • Explanations after finishing
Answered 0/5
FoundationWhich expression defines electric current I in terms of charge transfer?
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Current measures how quickly net charge crosses a chosen surface.

UnderstandingFor an ohmic resistor whose resistance remains constant, what happens to the current if the voltage across it is doubled?
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Use V = IR with R fixed.

ApplicationAn ideal 12 V source is connected across a single 6.0 ohm resistor. What current flows?
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Use I = V/R.

InterpretationTwo identical 6.0 ohm resistors are connected to the same ideal 12 V source, first in series and then in parallel. Which statement is correct about the total current drawn from the source?
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Find the equivalent resistance in each arrangement before using I_total = V/R_eq.

ConnectionA 6.0 ohm resistor and a 3.0 ohm resistor are connected in parallel across an ideal 12 V source. Which set is correct?
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Parallel branches have the same voltage. Calculate each branch current, add them at the junction, then infer R_eq.

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