PC Electrical Theory & Principles 2

Question 1

A series circuit has resistors of 10Ω, 20Ω, and 30Ω connected to a 120V source. What is the total current in the circuit?

Accepted Answer

2A

Answer

1A

Answer

4A

Answer

6A

Question 2

Which of the following best describes the relationship between power, voltage, and current in a DC circuit?

Accepted Answer

P = V × I

Answer

P = V/I

Answer

P = I/V

Answer

P = V + I

Question 3

In a series circuit, if one resistor increases in value, the total current will:

Accepted Answer

Decrease

Answer

Increase

Answer

Remain the same

Answer

Double

Question 4

A 1,500W electric heater is connected to a 120V circuit. What is the operating current?

Accepted Answer

12.5A

Answer

8A

Answer

10A

Answer

15A

Question 5

Kirchhoff's Voltage Law (KVL) states that the algebraic sum of all voltages around any closed loop is:

Accepted Answer

Zero

Answer

Equal to the source voltage

Answer

Equal to the largest resistor drop

Answer

Infinite

Question 6

What is the resistance of a conductor if 5A flows through it when 25V is applied?

Accepted Answer

5Ω

Answer

0.2Ω

Answer

125Ω

Answer

30Ω

Question 7

Which statement about voltage drops in a series circuit is correct?

Accepted Answer

Voltage drops are proportional to resistance values

Answer

All resistors have equal voltage drops

Answer

The largest resistor has the smallest voltage drop

Answer

Voltage drop is independent of resistance