Polytechnic Engineering Fundamentals 1

Question 1

What is Ohm's Law?

Accepted Answer

V = IR

Answer

Ohm's Law states that voltage equals current multiplied by resistance: V = IR.

Question 2

Which of the following best describes stress in engineering mechanics?

Accepted Answer

Force per unit area

Answer

Stress is defined as the internal force acting per unit cross-sectional area within a material.

Question 3

What is Newton's Second Law of Motion?

Accepted Answer

F = ma

Answer

Newton's Second Law states that the net force on an object equals its mass multiplied by its acceleration.

Question 4

What is the unit of electrical resistance?

Accepted Answer

Ohm (Ω)

Answer

Electrical resistance is measured in ohms (Ω), named after physicist Georg Simon Ohm.

Question 5

What does the Young's Modulus (E) measure?

Accepted Answer

Stiffness of a material

Answer

Young's Modulus is the ratio of stress to strain and measures the stiffness (elasticity) of a material.

Polytechnic Practice Test