EOC Physics 3

Question 1

What is the SI unit of electric current?

Accepted Answer

Ampere

Answer

The ampere (A) is the SI unit of electric current, measuring the flow of electric charge per unit time.

Question 2

According to Ohm's Law, if voltage doubles while resistance stays constant, what happens to current?

Accepted Answer

Current doubles

Answer

Ohm's Law states V = IR; if R is constant and V doubles, then I = V/R also doubles.

Question 3

Which law states that the total current entering a junction in a circuit equals the total current leaving it?

Accepted Answer

Kirchhoff's Current Law

Answer

Kirchhoff's Current Law (KCL) states that the algebraic sum of currents at any junction is zero, meaning current entering equals current leaving.

Question 4

What happens to the resistance of a metallic conductor as its temperature increases?

Accepted Answer

Resistance increases

Answer

In most metallic conductors, increased temperature causes atoms to vibrate more, increasing collisions with electrons and thus increasing electrical resistance.

Question 5

A magnet is moved rapidly into a coil of wire. What is produced in the coil?

Accepted Answer

An induced electric current

Answer

According to Faraday's Law of Electromagnetic Induction, a changing magnetic flux through a coil induces an electromotive force (EMF) and thus an electric current.

EOC - End-of-Course Test Practice Test

EOC - End-of-Course Test Practice Test

EOC Physics 3