IBEW IBEW Aptitude Test Electrical Fundamentals Questions and Answers

Question 1

What is the unit of electrical resistance?

Accepted Answer

Ohm

Answer

The ohm (Ω) is the SI unit of electrical resistance, named after Georg Simon Ohm.

Question 2

Ohm's Law states that voltage (V) equals:

Accepted Answer

Current × Resistance

Answer

Ohm's Law is V = I × R, where V is voltage, I is current in amperes, and R is resistance in ohms.

Question 3

In a series circuit with resistors of 10Ω and 20Ω, what is the total resistance?

Accepted Answer

30Ω

Answer

In a series circuit, resistances add directly: 10Ω + 20Ω = 30Ω.

Question 4

What is the unit of electrical current?

Accepted Answer

Ampere

Answer

The ampere (A) is the SI base unit for measuring the flow of electric current.

Question 5

Which material is the best conductor of electricity among these options?

Accepted Answer

Copper

Answer

Copper has very low electrical resistance and is the most commonly used conductor in electrical wiring.

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