Electric current is the circulation of electrons with a completecircuit the conductors. It is used to power every little thing from our lights to our trains.

You are watching: Which of these best describes an electric current

In this activities, students will explore different kinds that circuits and investigate what is forced to make a finish circuit.


Electrons on the GoBuild a CircuitConducting CurrentsLemon BatteryLighting light BulbsConductivity TesterBurglar AlarmSteady Hand Game

Playful Circuits: placed the art in STEAM

Learn first how to cable a an easy circuit, then heavy steam ahead to integrate art materials with the circuit and also create an electric birthday card, party hat, or various other seasonally-themed item.

Paper Circuits: Copper ice cream circuits and electric cardsSquishy Circuits: Conductive Playdough connectionsSewn Circuits: Conductive thread and also light-up bracelets


describe the contents required to complete an electrical circuit.

Demonstrate the different ways to complete a circuit (parallel or series).

Identify how electrical power is supplied in family members appliances.

Describe the relationship in between an electron and current electricity.


watch individual activities for materials.


Electricity is provided to operate your cell phone, power trains and also ships, run your refrigerator, and also power electric motors in machines like food processors. Electric energy need to be adjusted to other develops of power such together heat, light or mechanical in stimulate to it is in useful.

Everything we watch is made up of tiny little parts dubbed atoms. The atoms are made of even smaller parts called protons, electrons and also neutrons. An atom usually has the same number of protons (which have a confident charge) and also electrons (which have actually a negative charge). Sometimes electrons deserve to be moved away from their atoms.

Electric current is the motion of electrons with a wire. Electric present is measured in amperes (amps) and also refers come the variety of charges that move through the cable per second.

In order for a existing to flow, the circuit have to be closed; in other words, there have to be an uninterrupted route from the power source, through the circuit, then ago to the strength source.

Parallel Circuit (top)


Series Circuit (bottom)

Voltage is sometimes referred to as electric potential and also is measured in volts. The voltage in between two clues in a circuit is the total energy required to move a tiny electric charge from one point to the other, separated by the size of the charge.

Resistance is measure in ohms and also refers to the forces that oppose the flow of electron current in a wire. We have the right to use resistance to our benefit by transforming the electric energy lost in a resistor right into heat energy (like in an electrical stove), light power (a irradiate bulb), sound energy (radio), mechanical energy (electric fan), or magnetic energy (an electromagnet). If us want present to flow straight from one allude to another, we should use a cable that has as little resistance together possible.

A succinct analogy to help understand these terms: a mechanism of plumbing pipes.

Voltage is identical to the water push that pushes water out right into the pipeCurrent is tantamount to the rate of the water flowResistance is sort of favor the pipe broad – the diluent the pipe, the higher the resistance, and the harder the is for the water the circulation through.

In this series of activities, students will experiment through wires, batteries, and also switches to develop their own electric circuits, if learning around voltage, current, and also resistance in ~ the exact same time.

Fun fact!

You may notice that the icons for numerous of the SI systems (International mechanism of Units) in this lesson setup are capitalized, such together the volt (V) and the ampere (A), together opposed to the ones you’re supplied to utilizing (m, kg). That is legacy to usage a funding letter as soon as the unit is named after a person. In this cases, the devices were called after Alessandro Volta and also André-Marie Ampère. The unit because that resistance was also named after ~ a person (Georg Simon Ohm), but uses the symbol Ω which represents the Greek letter omega. These rules are crucial to follow due to the fact that the lower- and uppercase letters may represent various units, such as the tonne (t) and the tesla (T). The one exemption is that it is acceptable to usage L for litres due to the fact that the letter ‘l’ is often confused for the number ‘1’!


ammeter: an instrument used to measure up the electric current in a circuit; the unit of measurement is amperes or amps (A).circuit: A path because that electric current come flow.conductor: A substance comprised of atoms which host electrons loosely, allowing them to relocate through it much more easily.electric current: A continuous circulation of electrical charge moving from one location to another along a pathway; required to make all electrical devices work; measured in amperes or amps (A).electrochemical reaction: A reaction that most often entails the deliver of electrons between two substances, either resulted in by or add by an electrical current.electrode: A conductor v which a current enters or leaves things or substance.electron: A subatomic bit that has a an unfavorable electrical charge.insulator: A substance comprised of atom that organize onto electrons an extremely tightly, thus not allowing electrons to move through really easily.parallel circuit: A type of circuit that permits current to flow through parallel paths. Electric present is split between the various paths. If irradiate bulbs are connected in a parallel circuit, and one that the bulbs is removed, the existing will quiet be able to circulation to light the other bulbs in the circuit.semiconductor: A substance comprised of atom that hold ~ above electrons with a strength in between that of a conductor and that of an insulator.series circuit: A circuit in which all of the components are connected along a solitary path, so the the same current flows through every one of the components. If one of the irradiate bulbs is removed, the circuit is broken and none the the other lights will work.voltage: The potential difference in between two points in a circuit, such as the positive and an adverse ends that a battery. It is often explained as the “push” or “force” of the electricity. That is feasible to have voltage without current (if the circuit is incomplete, for example, and the electrons can not flow), however not feasible to have actually a present without voltage. That is measure up in volts (V).

See more: Does Ben Affleck Wear A Toupee, 12 Male Celebs With Toupee

voltmeter: an instrument used to measure the potential electric difference between 2 points in a circuit.

Other Resources

BC Hydro | power Smart for Schools

BC Hydro | Exploring simple Circuits

BC Hydro | Exploring collection and Parallel Circuits

BC Hydro | electrical Safety

How Stuff functions | how Light create Diodes Work

To acquisition Christmas tree mini-light bulbs: home Depot, Canadian Tire

To purchase small teaching irradiate bulbs (with a rating that no an ext than 2 volts each): Boreal Science