Wound into a coil and connected to a cell, it behaves like a magnet.
An iron nail inside the coil makes the electromagnet far stronger.
Like any magnet, found by testing which end attracts a compass pole.
More current or more coil turns strengthens it; reversing the current reverses its poles.
Hung from cranes, switched on to lift iron or steel — common in factories and scrap yards.
Currents in Earth's core create its magnetic field, helping animals navigate and shielding us from space particles.
More current, more heat.
Higher resistance, more heat.
Thinner, longer wires heat more.
Longer flow, more total heat.
Heaters, kettles, irons, and hair dryers all contain a heating element.
Household circuits include safety devices; electric furnaces recycle scrap steel at high heat.
A paste electrolyte between zinc and carbon — single-use, then disposed of.
Lithium-ion batteries power phones and EVs, recharged many times — recycle as e-waste when done.
A current-carrying wire creates a magnetic field.
A current-carrying coil that behaves like a magnet.
Heat generated in a conductor due to resistance.
Opposition a conductor offers to current flow.
The conducting liquid / the metal rod in a cell.
Generates current via a chemical reaction.
A single-use cell with a paste electrolyte.
Can be recharged and reused many times.