Electrical Theory Review

If the current in the circuit is decreased, the voltage drop across each component will ____.

• decrease

• become erratic

• increase

• remain the same

Answer explanation

Lesson 1, Slide 45

A coulomb of electrons moving past a point in one second is equal to _____.

• 1 A of current flow

• 1 Ω of resistance

• 1 V of electrical potential

• 1 W of power consumed

Answer explanation

Lesson 1, Slide 26

What is the applied voltage of the circuit if the resistance is 32 Ω and the current is 2 amperes?

• 64 V

• 96 V

• 16 V

• 32 V

Answer explanation

E_T = I_T + R_T

Lesson 1, Slide 78

If a circuit has a current flow of 1.2 amperes and an applied voltage of 120 volts, what is the resistance of the circuit?

• 100 Ω

• 120 Ω

• 144 Ω

• 1.2 Ω

If a circuit has an applied voltage of 480 volts and a power consumption of 640 watts, what is the resistance of the circuit?

• 360 Ω

• 1.155 Ω

• 1.333 Ω

• 853.333 Ω

This drawing is an example of a(n) _____ drawing.

• schematic

• architectural

• photographic

• pictorial

Answer explanation

Lesson 2, Slide 10

Determine the total current, I_T, for the circuit.
Given: E_T = 24 V, E₁ = 8 V, E₃ = 4 V, E₄ = 3 V, R₂ = 120 Ω.

• 75 mA

• 13.3 mA

• 25 mA

• 200 mA

Answer explanation

Determine E₂ given the voltage rules for series circuits.

Calculate the current through E₂.

I_T = I₂

Lesson 2, Slides 70 and 83

Determine the total resistance in the circuit, given: R₁ = 50 Ω, R₂ = 75 Ω, and R₃ = 150 Ω.

• 25 Ω

• 14.29 Ω

• 50 Ω

• 275 Ω

Determine the voltage across resistor R₂, given: R₁ = 50 Ω, R₂ = 75 Ω, I₁ = 2.4 A.

• 120 V

• 72 V

• 180 V

• 300 V

Answer explanation

Solve for voltage across R₁.

E₁ = E_T

Lesson 3, Slide 25

Determine the total resistance of the circuit, given: R₁ = 1.6 kΩ, R₂ = 2.2 kΩ, R₃ = 1.5 kΩ, R₄ = 3.3 kΩ, R₅ = 960 Ω.

• 4.07 kΩ

• 4.3 kΩ

• 506 Ω

• 3.74 kΩ

Answer explanation

Lesson 4, Slide 22