Ceist Eile

Ceist Eile is in development. Features, questions and prices may change while we refine it.

Junior Cycle · Junior Cycle Science

Junior Cycle Science: Electricity & circuits

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

CL Asked on 5 of the last 6 Common Level papers, most recently in 2025. most years

Electricity & circuits, Common Level(8 marks)

Quick ones on Electricity & circuits.

(a)What is the unit of electrical resistance?
  1. Volt (V)
  2. Ohm (Ω)
  3. Ampere (A)
(b)How is an ammeter connected to measure the current through a bulb?
  1. Across the battery
  2. In parallel with it
  3. In series with the bulb
(c)A bulb has 12 V across it and 2 A flowing through it. What is its resistance?
  1. 6 Ω
  2. 14 Ω
  3. 24 Ω
Show the answers

(a) Ohm (Ω)

(b) In series with the bulb

(c) 6 Ω

Your turn: Common Level questions on Electricity & circuits.

Common Level

Asked on 5 of the last 6 Common Level papers, most recently in 2025. most years

Every paper, year by year

YearWhere it came up
2026Not asked
2025Q11
2024Q5, Q9
2023Q5
2022Q13
2019Q12, Q13

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

More Electricity & circuits questions

Electricity & circuits, 3 marks

As a thermistor gets warmer, what usually happens to its resistance?

  1. It rises
  2. It stays the same
  3. It falls
Show the answer

It falls

In a common thermistor, resistance drops as temperature rises, so more current flows. This makes it useful in fire alarms and thermostats to sense heat.

Electricity & circuits, 3 marks

Why is a resistor placed in series with an LED?

  1. To make it flash
  2. To limit the current
  3. To increase current
Show the answer

To limit the current

An LED can be damaged by too much current, so a resistor in series limits the current to a safe value. LEDs also only light when connected the right way round.

Other Science topics

All of Junior Cycle Science