NCATT Basic Circuits Theory of Operation - Level B

Question 1

Define Power

Answer 1

Power—Product of applied voltage and current power in a DC circuit. Product of applied voltage and the current in phase with the voltage in an AC circuit.

Question 2

Define Joules

Answer 2

Joules—International measure of energy expended in the kilogram, meter, and second system of units. Also known as a Newton-meter, a Joules is the amount of work done when a force of one newton moves an object one meter along the direction of the force.

Question 3

Define Series Circuit

Answer 3

Series Circuits—Contains only one path for current, making current common through all components. Series circuit components are connected end-to-end.

Question 4

Define Parallel Circuit

Answer 4

Parallel Circuits—Contains more than one path for current. Circuit components are connected directly across each other. Current is divided between each branch in the circuit.

Question 5

Define Complex Circuits

Answer 5

Complex Circuits—Contains a combination of series and parallel circuits.

Question 6

Define Voltage Drop

Answer 6

Voltage Drop—Reduction in voltage caused by current flowing through a resistor. Voltage drop is called an IR (Current x Resistance) drop.

Question 7

What is the effect of Resistors in Series Circuits?

Answer 7

Causes a reduction of current in one circuit.

Question 8

What is the effect of Resistors in Parallel Circuits?

Answer 8

Causes a reduction of current in multiple circuits.

Question 9

Define Kirchoff’s Current Law (KCL)

Answer 9

Kirchhoff’s Current Law (KCL)—Kirchhoff’s Current Law states that “the algebraic sum of the current flowing away from any point in an electrical circuit is equal to the sum of the current flowing to that point.”

Question 10

Define Kirchoff’s Voltage Law (KVL)

Answer 10

Kirchhoff’s Voltage Law (KVL)—Kirchhoff’s Voltage Law states that “the algebraic sum of all of the voltage drops in any closed circuit is equal to zero.”

Question 11

Define Kirchoff’s Resistance Law (KRL)

Answer 11

Kirchhoff’s Resistance Law (KRL))—Kirchhoff’s Resistance Law states that “the total resistance in a series circuit is the sum of the individual resistances or loads in the circuit.”

Question 12

Define Bridge Circuits

Answer 12

Bridge Circuits—Contains four impedances that form a square. Two diagonally opposite corners are connected to an input device. The other two diagonally opposite corners are connected to an output device.