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AP Physics 2 Electric Current, Resistance, and Ohm's Law — practice questions

Explore 23 free Electric Current, Resistance, and Ohm's Law questions in AP Physics 2 Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Electric Current, Resistance, and Ohm's Law questions and exercises with answers

Showing questions 1–23 of 23.

Electric current is defined as the rate at which:Read the answer and worked solution →The SI unit for electric current is the:Read the answer and worked solution →The ampere is described as one coulomb per:Read the answer and worked solution →The ampere is named for a physicist from which country?Read the answer and worked solution →Direct current is defined as the flow of electric charge in:Read the answer and worked solution →A circuit whose source varies periodically, particularly sinusoidally, is known as:Read the answer and worked solution →The strength of the resistance in a circuit element depends on the element's:Read the answer and worked solution →Macroscopic properties of materials, including resistivity, are said to depend on their:Read the answer and worked solution →Combining the relationships of current to voltage and current to resistance gives:Read the answer and worked solution →Because the SI unit for potential energy is the joule, power has units of:Read the answer and worked solution →Lightbulbs are commonly rated in which unit?Read the answer and worked solution →Fuses and circuit breakers are rated in which unit?Read the answer and worked solution →Of the three expressions given for electric power, how many are valid for any circuit element?Read the answer and worked solution →Two of the three electric power expressions are restricted because they can be used only for:Read the answer and worked solution →A current of 3 amperes means charge passes a point at a rate of:Read the answer and worked solution →Electric energy and electric power are connected by treating power as a rate of:Read the answer and worked solution →A battery supplies a constant voltage, which makes the circuit it drives:Read the answer and worked solution →Two wires of identical shape but different metals carry different currents at the same voltage because resistivity depends on:Read the answer and worked solution →Match each electrical quantityRead the answer and worked solution →Work the current arithmeticRead the answer and worked solution →True or false: current and resistanceRead the answer and worked solution →Tap what belongs to each current typeRead the answer and worked solution →Complete the circuit unitsRead the answer and worked solution →

Worked practice questions

Electric current is defined as the rate at which:

  1. Charge flows
  2. Mass moves
  3. Heat escapes
  4. Light travels
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Correct answer: A. Charge flows

1. Current is a rate, so it counts something per unit time. 2. Electric current is defined to be the rate at which charge flows. 3. More charge past a point each second means a larger current. 4. Heat and light flows are described by other quantities. _Source: OpenStax College Physics for AP Courses 2e (CC BY 4.0), Ch 20 'Electric Current, Resistance, and Ohm's Law', sections 20.1-20.7_

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The SI unit for electric current is the:

  1. An ohm unit
  2. An ampere
  3. A coulomb
  4. A volt unit
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Correct answer: B. An ampere

1. Each electrical quantity has its own SI unit. 2. Current is the rate at which charge flows. 3. The SI unit for current is the ampere, written A. 4. It is named for the French physicist Andre-Marie Ampere. _Source: OpenStax College Physics for AP Courses 2e (CC BY 4.0), Ch 20 'Electric Current, Resistance, and Ohm's Law', sections 20.1-20.7_

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The ampere is described as one coulomb per:

  1. Each second
  2. Each metre
  3. Each kilogram
  4. Each kelvin
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Correct answer: A. Each second

1. The unit follows directly from the definition of current. 2. Current is the rate at which charge flows. 3. Charge is measured in coulombs and rate is per unit time. 4. So an ampere is one coulomb per second. _Source: OpenStax College Physics for AP Courses 2e (CC BY 4.0), Ch 20 'Electric Current, Resistance, and Ohm's Law', sections 20.1-20.7_

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