Ch 2

Question 1

(T/F) Smaller conductors have greater resistance and larger conductors have lower resistance

Answer 1

True

Question 2

(T/F) According to the Conventional Current Flow Theory, a positive charge flows from positive to negative in the circuit

Answer 2

True

Question 3

(T/F) Power is not equal to E x I for ac circuits because consideration must be given to inductive reactance

Answer 3

True

Question 4

(T/F) Often the resistance of the power source and conductor are ignored in circuit calculations

Answer 4

True

Question 5

What is the formula for input?

Answer 5

Input = Output / Efficiency

Question 6

How would you find the reciprocal of 1.25?

Answer 6

1 / 1.25

Question 7

The Ohm’s Law formula, I = E/R, states that current is _____ proportional to the voltage and ____ proportional to the resistance.

Answer 7

directly : inversely

Question 8

Power in a circuit can be either “useful” or “wasted”. Wasted work is still energy used; therefore it must be paid for, so we call this “_______”

Answer 8

Power losses

Question 9

Ohm’s Law demonstrates the relationship between circuit _____ (intensity, EMF, or resistance)

Answer 9

All of them

Question 10

What is the Kw of a 75W load?

Answer 10

.075 kW

Question 11

(T/F) Squaring a number means multiplying the number by itslef

Answer 11

True

Question 12

In an ac circuit, the factors that oppose current flow are ______

Answer 12

resistance , inductive reactance, & capacitive reactance

Question 13

The volume of an enclosure is expressed in ______

Answer 13

Cubic Inches

Question 14

An electrical circuit consists of what three things?

Answer 14

Power Source : Conductors : Load

Question 15

Put these conductors in their order for conductivity: Gold, silver, copper aluminum

Answer 15

Silver : Copper : Gold : Aluminum

Question 16

(T/F) The work that ca be performed by moving electrons depends on the circuit pressure and the circuit’s opposition to the flow of electrons

Answer 16

True

Question 17

According the the Electron Current Flow Theory, electrons leave the _____ terminal of the source, flow through the conductors and load(s) and return to the _____ terminal of the source

Answer 17

Negative : Positive

Question 18

(T/F) The major advantage of ac over dc is the ease of voltage regulation by the use of a transformer

Answer 18

True

Question 19

(T/F) The voltage applied to a resistor dramatically affects the power consumed by that resistor because power is affected in direct proportion to the voltage

Answer 19

False

Question 20

(T/F) DC power is determined by multiplying the electromotive force by the circuit intensity

Answer 20

True

Question 21

The method of increasing a number by another number is done by using a _______

Answer 21

Multiplier

Question 22

Electrical pressure is called “______”, and it is measured in volts.

Answer 22

EMF or Potential

Question 23

(T/F) Conductance is the property that permits current to flow

Answer 23

(T/F)

Question 24

(T/F) Deriving the square root of a number is almost the same as squaring a number

Answer 24

False

Question 25

(T/F) The polarity and the output voltage from a dc power source changes direction

Answer 25

False

Question 26

How do you find the reciprocal of a number?

Answer 26

Turn that number into a decimal and divide it into the number 1

Question 27

(T/F) According to the Electron Current Flow Theory, electrons flow away from the negative terminal of the source, through the circuit and load, toward the positive terminal of the source

Answer 27

True

Question 28

In electrical systems, the volume of electrons that move through a conductor is called the “circuits _____”

Answer 28

Intensity

Question 29

“______” is defined as the rate of work measured by the unit called the watt

Answer 29

Power

Question 30

(T/F) Aluminum has lower resistance to the flow of electrons than does copper

Answer 30

False

Question 31

to change a percent value to a decimal or whole number, drop the percentage sign and move the decimal point two places to the _______

Answer 31

Left

Question 32

(T/F) Every component of an electrical circuit contains resistance, except the power supply.

Answer 32

False

Question 33

The formulas in the formula wheel apply to ______

Answer 33

dc and ac circuits with unity power factor