BMST - Basic Math and Science Electrical Circuits and Ohm's Law Questions and Answers 2

Question 1

According to Ohm's Law, if voltage is 12V and resistance is 4Ω, what is the current?

Accepted Answer

3A

Answer

Ohm's Law: I = V/R = 12/4 = 3 amperes.

Question 2

In a series circuit with three resistors of 2Ω, 3Ω, and 5Ω, what is the total resistance?

Accepted Answer

10Ω

Answer

In series circuits, total resistance is the sum: 2 + 3 + 5 = 10Ω.

Question 3

What is the unit of electrical resistance?

Accepted Answer

Ohm (Ω)

Answer

Resistance is measured in ohms (Ω), named after Georg Simon Ohm.

Question 4

What happens to current in a circuit if resistance doubles while voltage stays constant?

Accepted Answer

Current is halved

Answer

From I = V/R, doubling R halves I when V is constant.

Question 5

In a parallel circuit, what is true about the voltage across each branch?

Accepted Answer

It is the same across all branches

Answer

In parallel circuits, all branches share the same voltage from the source.

BMST - Basic Math and Science Test Practice Test