DC/AC Theory
I Should Know This
This is "Electric"
NEC
Instructor's Choice
100

You have a 10 ohm, 20 ohm and 30 ohm resistor connected in series to a 24 volt source. This is the number of paths for current flow found in this series circuit.

one

100

This is the total opposition the current flow in a DC circuit.

resistance

100

Farmers often use this to keep animals out or in.

Electric fence

100

This article of the National Electric Code is the main article to look at when seeking information on branch circuits.

Article 210

100

This is an electrical device that uses electromagnetism to change voltage from one level to another or to isolate one voltage from another.

transformer

200

This is the total opposition to current flow in an AC circuit that contains resistance, capacitance and inductance.

impedance

200

A branch circuit that consists of two or more ungrounded conductors that have a voltage between them, and a grounded conductor that has equal voltage between it and each ungrounded conductor of the circuit. And that is connected to the neutral or grounded conductor of the system.

Multiwire branch circuit

200

Prisoners in some states may find their end of the road here.

Electric chair

200

This table should be used to determine the full load current values for all calculations with the exception of overloads for a three-phase motor.

Table 430.250

200

This type of magnetism is used to convert electrical energy to a rotating mechanical force on a motor shaft.

Electromagnetism

300

A heating element in a heater has a resistance of 25 ohms and draws a current of 10 amperes.  This is the amount of power in kilowatts that is dissipated in the heater.

2.5 kW

300

The purpose of the code is the practical safeguarding of this from the hazards arising from the use of electricity.

Persons and property

300

For a charged up time you may find it on this road in the city.

Electric avenue

300

This table should be used to determine the minimum burial depth for all wiring methods 0 to 1000 V.

Table 300.5

300

What do they call the opposition to current flow created by any capacitor in a circuit?

Capacitive Reactance (Xc)

400

What do they call the opposition to current flow created by any inductor in a circuit?

Inductive Reactance (XL)

400

The name of the formula most often used for all calculations in a DC series or parallel circuit.

Ohms Law

400

This is the term applied to power being generated with flowing water.

Hydroelectric

400

Based on three conditions and on the nominal voltage to ground, which table should be use to determine the minimum clearance distance for working space?

•Table 110.26(A)(1) ….. Table 110.26 is acceptable.

400

A common but perhaps overlooked conductor is the surface or subsurface of this.

Earth

500

This is the amount of current flowing in a SERIES CIRCUIT  with an inductor having a reactance of 40 ohms, a capacitor having a reactance of 24 ohms and a resistor of 12 ohms...voltage 120 volts.  You do get an extra minute on this one. :-)

6 amps

500

This is the "Dan" reason why transformers hum.

They don't know the words. 

500

This is commonly seen during the celebration at many weddings.

Electric Slide

500

•What is the main table used for determining how much current a wire can handle with the following conditions: 

60° C through 90° C 

Not More Than Three Current-Carrying Conductors in a Raceway, Cable, or  directly buried.

Table 310.16

500

This is the solution for X in the following equation.

7x + 35 = 84

7