Mechanical Aptitude Test Mechanical Aptitude Basic Electrical Circuits 1

Question 1

In a series circuit with three resistors of 4 ohms, 6 ohms, and 10 ohms, what is the total resistance?

Accepted Answer

20 ohms

Answer

In a series circuit, total resistance is the sum of all individual resistances: 4 + 6 + 10 = 20 ohms.

Question 2

A circuit has a voltage of 12 volts and a current of 2 amperes. What is the resistance?

Accepted Answer

6 ohms

Answer

Using Ohm's Law, R = V / I = 12 / 2 = 6 ohms.

Question 3

Which of the following best describes a conductor?

Accepted Answer

A material that allows electrons to flow freely

Answer

A conductor is a material with low resistance that allows electrons to move freely through it; metals like copper are common examples.

Question 4

What happens to current in a series circuit if one component burns out (open circuit)?

Accepted Answer

Current stops flowing through the entire circuit

Answer

In a series circuit, all components share the same single path. If that path is broken anywhere, current cannot flow at all.

Question 5

A light bulb is rated at 60 watts and operates on 120 volts. What current does it draw?

Accepted Answer

0.5 amperes

Answer

Using P = V × I, rearranged to I = P / V = 60 / 120 = 0.5 amperes.

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