GradeGen

A current that flows in one direction only.

An electric current in which charge moves in one direction only.

Direct current, abbreviated to d.c., is current in which charge moves in one direction only. The word direct describes the direction of charge movement: the direction does not repeatedly reverse.

Electric current that flows in one direction around a circuit.

A d.c. power supply is represented by its output terminals, with positive and negative polarity identified where needed.

Current that flows in one direction, although its size may vary.

In a d.c. series circuit, the same current passes through every component in the single loop.

Current that flows in one direction, even if its size varies.

For a ‘describe direct current’ question, state that charge moves in one direction only and that cells and batteries supply d.c.

Do not define d.c. merely as ‘current from a battery’: include the direction of charge movement.

Check the direction of a diode and the polarity of a d.c. supply before deciding whether a complete conducting path exists.