Chapter 2- Voltage, Current, and Resistance

How does a fuel cell differ from a battery?

Reactants flow in continuously

Current is defined as charge flow per unit of:

Time

Ohm's Law states that 1 Ω = 1 V per:

1A

The three essential circuit elements are:

Voltage source, path, load

A digital multimeter can measure:

Resistance, Current, Voltage

Valence electrons are responsible for:

Chemical bonding and current flow

N-type semiconductors are doped with:

Phosphorus (5 valence electrons)

A PN junction allows current to flow:

in one direction only.

Piezoelectricity  generates voltage from:

Mechanical Pressure

Seebeck effect produces voltage using:

Temperature differences

True or False: Insulators have low resistivity.

False

Conventional current assumes charge flows from:

Positive to Negative

To measure voltage, a multimeter is connected:

in parallel with the circuit component

A fuse protects a circuit by:

Melting during overcurrent

The unit of conductance is the:

siemens

Coulomb's Law describes the force between:

Electric Charges

AWG wire standards are based on:

the diameter of the wire.

A rheostat controls:

Current via variable resistance

PCB substrates like fiberglass provide:

Insulation and mechanical support

Ionization involves removing a(n):

Valence Electron

Betavoltaic devices convert energy from:

Radioactive decay

Conductor Properties

-Used in Wires

-Free Electrons

Electrical Energy Sources

-Light

-Chemical Reactions

-Magnetic Induction