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Junior Cycle Engineering: Electricity & circuits

How often Electricity & circuits comes up on the Engineering papers, every year it was asked, and questions to try.

CL Asked on 3 of the last 5 Common Level papers, most recently in 2025. most years

Electricity & circuits, Common Level(7 marks)

Quick ones on Electricity & circuits.

(a)What does DC mean on a battery-powered device?
  1. Direct current, changing direction
  2. Direct current, flowing one way only
  3. Double circuit, with two loops
(b)A resistor has 6 V across it and a current of 0.5 A through it. What is its resistance?
  1. 6.5 Ω
  2. 3 Ω
  3. 12 Ω
(c)In a three-pin plug, what colour is the insulation on the live wire?
  1. Brown
  2. Green and yellow
  3. Blue
Show the answers

(a) Direct current, flowing one way only

(b) 12 Ω

(c) Brown

Your turn: Common Level questions on Electricity & circuits.

Common Level

Asked on 3 of the last 5 Common Level papers, most recently in 2025. most years

Every paper, year by year

YearWhere it came up
2026Not asked
2025Q1d, Q2c, Q4b
2024Q4b
2023Q2e
2022Not asked

Links open the State Examinations Commission’s paper for that year.

More Electricity & circuits questions

Electricity & circuits, 2 marks

What does the 9 V printed on a battery tell you?

  1. How much current it stores
  2. How many hours it will last before going flat
  3. How hard it pushes current round a circuit
Show the answer

How hard it pushes current round a circuit

Voltage, measured in volts (V), is the electrical push that drives current round a circuit. Current, in amps (A), is the flow. How long a battery lasts depends on its capacity.

Electricity & circuits, 3 marks

Two identical bulbs are wired in parallel to a battery. What happens if one bulb blows?

  1. The other bulb gets dimmer
  2. The other bulb stays lit
  3. Both bulbs go out
Show the answer

The other bulb stays lit

In parallel, each bulb has its own path to the battery, so one failing does not break the other's circuit. In series there is only one path, so both would go out.

Other Engineering topics

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