[D2L] 103G

Question 1

By winding a conductor into a coil, an electromagnet with poles will be produced when current is passed through the conductor?

Answer 1

True

Question 2

increasing the flow of current through a coil will..

Answer 2

increase the strength of the magnetic field

Question 3

passing a conductor in parallel to lines of flux will induce a current of electromotive force?

Answer 3

False, if parallel then creates nothing

Question 4

A 4 pole alternator rotates 3 times, producing how many electrical degrees?

Answer 4

2160

Question 5

what is the rpm of a VFD motor at 40hz. motor with 8 poles?

Answer 5

600

Question 6

what is the effective voltage of a sine wave that peaks at 50 vac?

Answer 6

35.35

Question 7

what frequency of ac power is being generated from an alternator spinning at 3200rpm with 2 poles?

Answer 7

53

Question 8

what is the effective voltage of a sine wave that peaks at 208 vac?

Answer 8

147

Question 9

if Emax is 120V what is the instantaneous value at 60*?

Answer 9

103.92 vac

Question 10

what would the instantaneous voltage value be at 30* angle of the sine wave of a system with 169.7V Peak voltage

Answer 10

85 vac

Question 11

what would the instantaneous voltage value be at 280* angle of the sine wave of a 240v RMS system?

Answer 11

-334.20 vac

Question 12

How is inductance defined?

Answer 12

The characteristic of an electric circuit that opposes a change in Current

Question 13

By forming the conductor into a coil…

Answer 13

Inductance is increased

Question 14

In circuits with primarily capacitive loads, current leads the voltage

Answer 14

True

Question 15

Impedance is the sum of adding up the Ohm values of the resistance, inductive reactance, and capacitive reactance

Answer 15

False,
Impedance is “any combination” of values of resistance, indutive reactance, and capacitive reactance