CapxuleCapxule

Is Ohm's law on the ham radio Technician exam?

Yes.

The 2026-2030 Technician Class FCC Element 2 Question Pool (in use July 1, 2026 to June 30, 2030) gives Ohm's law its own group, T5D, with 14 questions. Each exam takes one question from each of the pool's groups, so every exam has 1 question on the topic, out of 35 (26 correct to pass).

Where it sits in the question pool

  • Group T5D: 14 of 14 questions (the whole group)

    Ohm’s Law; Series and parallel circuits

    T5D01, T5D02, T5D03, T5D04, T5D05, T5D06, T5D07, T5D08, T5D09, T5D10, T5D11, T5D12, T5D13, T5D14

What you need to know

Ohm's law ties together the three basic quantities of a circuit: voltage (E, in volts), current (I, in amperes) and resistance (R, in ohms). Voltage equals current times resistance, so if you know any two you can find the third: current is voltage divided by resistance, and resistance is voltage divided by current.

The exam questions are mostly arithmetic with round numbers, such as finding the current through a resistor connected across a given voltage. The same group also asks about series and parallel circuits: in a series circuit the same current flows through every component, and in a parallel circuit every component has the same voltage across it.

Sample questions from the pool

T5D08

What is the current through a 100-ohm resistor connected across 200 volts?

  1. A. 20,000 amperes
  2. B. 0.5 amperes
  3. C. 2 amperes
  4. D. 100 amperes

Correct answer: C. 2 amperes

T5D06

What is the resistance of a circuit that draws 4 amperes from a 12-volt source?

  1. A. 3 ohms
  2. B. 16 ohms
  3. C. 48 ohms
  4. D. 8 ohms

Correct answer: A. 3 ohms

T5D13

In which type of circuit is the current always the same through all components?

  1. A. Series
  2. B. Parallel
  3. C. Resonant
  4. D. Branch

Correct answer: A. Series

Source: NCVEC, 2026-2030 Technician Class FCC Element 2 Question Pool, Public release of February 19, 2026, with the errata to the December 18, 2025 release, in use July 1, 2026 to June 30, 2030. Questions and answers quoted as published (public domain); the group counts come from the pool's syllabus. Passing score: 47 CFR 97.503, Element standards.

Practise for the ham radio Technician exam

The 2026-2030 Technician pool questions with their answers, drills by subelement, and mock exams of 35 questions drawn one from each group, 26 correct to pass. Free.

Start the practice test

All amateur radio practice tests

Other topics on the ham radio Technician exam

Independent study page, not affiliated with the NCVEC, the FCC or any VEC.