Electric Current

The video tutorial explains how electric current is carried by electrons in wires and ions in fluids. It describes the conventional direction of current flow as the direction of positive charge. Current is measured using an ammeter and is expressed in amperes, with one ampere equating to one coulomb of charge passing a point per second.

What carries electric current in wires?

• Protons

• Neutral atoms

• Negative electrons

• Positive ions

In fluids, what is responsible for carrying electric current?

• Neutral molecules

• Charged ions

• Electrons

• Photons

By convention, in which direction is electric current said to flow?

• In the direction of ion flow

• In the direction of electron flow

• Towards positive charge

• Towards negative charge

What instrument is used to measure electric current?

• Thermometer

• Voltmeter

• Ohmmeter

• Ammeter

One ampere is equivalent to how many coulombs of charge passing a point per second?

• 1 coulomb

• 5 coulombs

• 0.5 coulombs

• 2 coulombs