High Yield Drill

Series or parallel — ONE path for current?

Series.

Series or parallel — ADD the resistances directly?

Series. Parallel uses 1/Req = 1/R1 + 1/R2.

Series or parallel — same CURRENT everywhere?

Series.

Series or parallel — same VOLTAGE across each branch?

Parallel.

Resistance or impedance — which belongs to DC, which to AC?

DC has resistance. AC has impedance.

AC or DC — batteries produce which? Alternators produce which?

Batteries produce DC. Alternators produce AC.

What is the difference between AC and DC?

DC flows in one direction only. AC alternates the direction it flows.

What is the usual North American AC supply frequency?

60 Hz.

Which way do electrons flow in a circuit?

From the negative terminal (anode) to the positive terminal (cathode).

In a diode, which material is the anode? Which is the cathode?

The anode connects to P-type material. The cathode connects to N-type.

Forward-biased or reverse-biased — which lets electrons flow?

Forward-biased. Reverse-biased blocks them.

NPN or PNP — which is P sandwiched between two N layers?

NPN. PNP is N sandwiched between two P layers.

Potentiometer or rheostat — which has THREE terminals?

Potentiometer. A rheostat has two.

Does a LONGER wire have more or less resistance?

More.

Does a THICKER wire have more or less resistance?

Less.

What does a significant portion of this test actually cover?

Vocabulary — recognizing what electrical terms mean, not calculating with them.