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Worksheet: Ohm's Law

Q1:

A voltage drop of 3.412 V is measured across a resistance of 10.51 Ω. Calculate the current in the resistor.

Q2:

Which of the following is the best definition of electrical current, as measured in amperes?

  • AThe energy dissipated per coulomb of electrons between two given points
  • BThe number of electrons that pass a given point in one second
  • CThe energy dissipated per electron between two given points
  • DThe number of coulombs of electrons that pass a given point in one second
  • EThe energy dissipated by the electrons passing between two given points in one second

Q3:

If a redox couple is at equilibrium in an electrochemical cell, which of the following statements about the current and potential is most accurate?

  • AThe current is negative, and the potential is zero.
  • BThe current and potential are both zero.
  • C The current is positive, and the potential is zero.
  • DThe current is zero, and the potential is given by the Nernst equation.
  • EThe potential is zero, and the current is given by the Nernst equation.