Answer: the coulomb.
- A the volt
- B the coulomb
- C the ampere
- D the ohm
Correct answer: B. the coulomb
Explanation: Charge is measured in coulombs (C); the volt, ampere and ohm measure potential, current and resistance.
In a Daniell cell, electrons flow externally from the zinc anode (oxidation) through the voltmeter to the copper cathode (reduction), while the salt bridge completes the circuit.
Concept context
Explore the link between chemical reactions and electricity. Covers galvanic cells, electrolysis, standard electrode potentials, the Nernst equation, and real-world applications like batteries and corrosion.