Technician T6A: Resistors, capacitors, inductors, switches and batteries
These are the 11 official questions in group T6A of the 2026–2030 Technician question pool, with the correct answer marked and a plain-English explanation of why it's right. The real exam asks one question from this group.
- T6A01Question 1
What electrical component opposes the flow of current in a DC circuit?
- AInductor
- BResistor Correct
- CInverter
- DTransformer
Why: A resistor opposes the flow of current.
- T6A02Question 2
What type of component is often used as an adjustable volume control?
- AFixed resistor
- BPower resistor
- CPotentiometer Correct
- DTransformer
Why: A potentiometer (variable resistor) is the usual volume control.
- T6A03Question 3
What electrical parameter is controlled by a potentiometer?
- AInductance
- BResistance Correct
- CCapacitance
- DField strength
Why: A potentiometer adjusts resistance.
- T6A04Question 4
What electrical component stores energy in an electric field?
- AResistor
- BCapacitor Correct
- CInductor
- DDiode
Why: A capacitor stores energy in an electric field.
- T6A05Question 5
What type of electrical component consists of conductive surfaces separated by an insulator?
- AResistor
- BPotentiometer
- COscillator
- DCapacitor Correct
Why: A capacitor is conductive plates separated by an insulator.
- T6A06Question 6
What type of electrical component stores energy in a magnetic field?
- AResistor
- BCapacitor
- CInductor Correct
- DDiode
Why: An inductor stores energy in a magnetic field.
- T6A07Question 7
What electrical component is typically constructed as a coil of wire?
- ATransistor
- BCapacitor
- CDiode
- DInductor Correct
Why: An inductor is typically a coil of wire.
- T6A08Question 8
What is the function of an SPDT switch?
- AA single circuit is opened or closed
- BTwo circuits are opened or closed
- CA single circuit is switched between one of two other circuits Correct
- DTwo circuits are each switched between one of two other circuits
Why: SPDT (single-pole, double-throw) connects one circuit to either of two others.
- T6A09Question 9
What type of switch is represented by component 3 in figure T-2?
- ASingle-pole single-throw Correct
- BSingle-pole double-throw
- CDouble-pole single-throw
- DDouble-pole double-throw
Why: Component 3 in T-2 is a single-pole, single-throw switch: one circuit, on or off.
- T6A10Question 10
Which of the following battery chemistries is rechargeable?
- ANickel-metal hydride
- BLithium-ion
- CLead-acid
- DAll these choices are correct Correct
Why: NiMH, lithium-ion and lead-acid are all rechargeable.
- T6A11Question 11
Which of the following battery chemistries is not rechargeable?
- ANickel-cadmium
- BCarbon-zinc Correct
- CLead-acid
- DLithium-ion
Why: Carbon-zinc batteries are not rechargeable.