Electronics Information – Test 2

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

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

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.

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

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.

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

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

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

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

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

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

A microwave uses electromagnetic energy to heat food.

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

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