Element 3-8 Conduction

Question 1

what is the term used to identify an AC voltage that would cause the same heating in a resistor as a corresponding value of DC voltage?

Answer 1

RMS root means square (measure equivalent of DC)

Question 2

What happens to reactive power in a circuit that has both inductors and capacitors?

Answer 2

alternates between magnetic and electric fields and is not dissipated

Question 3

Halving a cross sectional area of a conductor will

Answer 3

double the resistance (smaller cross sectional means more resistance)

Question 4

Which of the following groups is correct for listing common materials in order of descending conductivity

Answer 4

silver, copper, aluminum. iron, and lead

Question 5

How do you compute true power(power dissipated in the circuit) in a circuit where AC voltage and current are out of phase?

Answer 5

multiply apparent power times the power factor

Question 6

Assuming a power to have a fixed value of internal resistance, maximum power will be transferred to the load when

Answer 6

load impedance equals the internal impedance of the source