309A Circuit Theory and Calculations

Question 1

What is the total resistance of three resistors connected in series with values of 10 Ω, 20 Ω, and 30 Ω?

Accepted Answer

60 Ω

Answer

5.45 Ω

Answer

20 Ω

Answer

600 Ω

Question 2

A 240 V single-phase circuit supplies a 5 kW resistive load. What is the current draw?

Accepted Answer

20.83 A

Answer

12.5 A

Answer

25 A

Answer

41.67 A

Question 3

What is the power factor of a circuit with a real power of 8 kW and an apparent power of 10 kVA?

Accepted Answer

0.80

Answer

0.60

Answer

0.75

Answer

1.25

Question 4

In a parallel circuit with two resistors of 12 Ω and 6 Ω, what is the total resistance?

Accepted Answer

4 Ω

Answer

2 Ω

Answer

6 Ω

Answer

18 Ω

Question 5

A conductor carries 15 A and has a resistance of 0.5 Ω. What is the voltage drop across it?

Accepted Answer

7.5 V

Answer

15 V

Answer

30 V

Answer

0.033 V

Question 6

What is the impedance of a series RL circuit with R = 30 Ω and XL = 40 Ω?

Accepted Answer

50 Ω

Answer

10 Ω

Answer

35 Ω

Answer

70 Ω