ASVAB · Circuits and Ohm's Law

In a parallel circuit, what is true about the voltage across each branch?

Correct answer

It is the same across each parallel branch

  1. A It is different for each branch
  2. B It is the same across each parallel branch
  3. C It is always zero
  4. D It decreases along the circuit

Why this is the answer

In a PARALLEL circuit, the VOLTAGE is the SAME across each parallel branch (each branch gets the full source voltage). ASVAB Electronics Information tests circuit types. PARALLEL CIRCUITS: same voltage across each branch; current divides among branches; total resistance is LESS than the smallest individual resistance; if one branch fails, others keep working. SERIES CIRCUITS: same current through all; voltage divides among components. Household wiring is parallel (so each outlet gets full voltage and devices work independently). Knowing voltage is equal across parallel branches is commonly tested.
Source: ASVAB Electronics Information — Parallel Circuits