Electronics Information – Test 2

The rating is usually defined in ‘amps’, the unit of measurement of electrical current.

A closed circuit allows current to flow, while an open circuit stands electrons.

650–1200 watts equates to current of 5.4–10 amps at 120 volts AC.

Active elements have the ability to electrically control electron flow (the flow of charge).

Under certain conditions, a conductor used to connect to a system neutral is also used for grounding (earthing) of equipment and structures.

An ammeter is used to measure the size of an electric current, the reading  is in units of ampere.

Connected in parallel with a variable voltage source, a Zener diode conducts when voltage reaches the diode's reverse breakdown voltage

A small current at the base terminal can control a much larger current between the collector and emitter.

Electric currents are measured in amperes (A), hence the name.

Fuses have specific amperage rating because they are intended to be the weak link in the circuit to protect electrical components.

Lots of household fires result from the use of a light extension cord with 16-gauge wire connected to a heating appliance.

Because of its cost, silver is rarely used as a conductor.

A microwave uses electromagnetic energy to heat food.

Electrons are negative, so they're repelled by the negative charge and drawn to the positive charge.

For example, an appliance could draw more current than the wires can safely handle, melting the insulation and igniting surrounding materials.

Because there is only one path for charge movement, the current is the same throughout the circuit.