WTMA Basic Electrical Principles 3

Question 1

What is the electrical resistance of a perfect conductor?

Accepted Answer

Zero ohms

Answer

A perfect conductor has zero resistance, allowing current to flow without any opposition or energy loss.

Question 2

A 120-volt circuit draws 2 amperes of current. What is the power consumption?

Accepted Answer

240 watts

Answer

Power (P) = Voltage (V) × Current (I) = 120 V × 2 A = 240 watts.

Question 3

What happens to total resistance when resistors are added in parallel?

Accepted Answer

Total resistance decreases

Answer

Adding resistors in parallel creates more paths for current, which reduces the overall resistance of the circuit.

Question 4

Which of the following is an example of an electrical insulator?

Accepted Answer

Plastic

Answer

Plastic has very high resistance and does not allow current to flow easily, making it a good insulator.

Question 5

A battery's voltage represents which of the following?

Accepted Answer

The electrical pressure that pushes current through a circuit

Answer

Voltage (electromotive force) is the electrical pressure or potential difference that drives current through a circuit.

WTMA - Wiesen Test of Mechanical Aptitude Practice Test