Flick a switch and a lamp lights at once. What flows round the wires is electric charge, and how much passes each second is the current. Measuring it just means putting a meter in the path.
Electric current is the flow of electric charge, measured in amperes by an ammeter connected in series. Conventional current is taken from positive to negative, while electrons drift the other way. Direct current flows one way; alternating current repeatedly reverses.
Electric current is the flow of electric charge, measured in amperes (A) by an ammeter connected in series. Conventional current flows from the positive terminal to the negative terminal.
Direct current (d.c.) flows in one direction; alternating current (a.c.) repeatedly reverses direction.
Connect the ammeter in series so the whole current flows through it.
Four quick checks. Each correct answer earns XP and lights this skill on your star map.
Electric current is measured with...
An ammeter is connected in...
Conventional current flows from...
The unit of electric current is the...
Conventional current and electron flow run opposite ways, and current can be steady or alternating.
An ammeter is connected in series, not parallel, so the whole current passes through it. Conventional current is taken from positive to negative, even though the electrons actually drift the opposite way.
Unlocks once the four checks above are done. Worth more XP, written in the style of Paper 2.
In a direct current, the charge...
To measure the current through a lamp, an ammeter should be connected...
In a metal wire carrying conventional current from left to right, the electrons actually move...
Electric current is mapped. Keep the chain going.