Free Amazon Maintenance Technician: Math Ohm's Law Question and Answers 1

Question 1

The following phrase accurately summarizes Ohm's law:

Accepted Answer

V = IR

Answer

Ohm's Law describes the fundamental relationship between voltage (V), current (I), and resistance (R) in an electrical circuit. The correct mathematical representation of this law is V = IR, stating that the voltage across a conductor is directly proportional to the current flowing through it, given a constant resistance.

Question 2

A 5-V battery powers a 10 ohm resistor. The source's current is as follows:

Accepted Answer

0.5 A

Answer

According to Ohm's Law (V = IR), current (I) can be calculated by dividing voltage (V) by resistance (R). Given a voltage of 5 V and a resistance of 10 ohms, the current is calculated as I = 5 V / 10 Ω, which equals 0.5 Amperes.

Question 3

R = ___ if V = 50 V and I = 5 A:

Accepted Answer

10 Ω

Answer

Using Ohm's Law (V = IR), resistance (R) can be found by dividing the voltage (V) by the current (I). With a voltage of 50 V and a current of 5 A, the resistance is calculated as R = 50 V / 5 A, resulting in 10 ohms.

Question 4

I = ___ if P = 50 watts and R = 2 ohms.

Accepted Answer

5 A

Answer

To find the current (I) when power (P) and resistance (R) are known, we use the formula P = I²R. Rearranging this equation, I² = P/R, so I = √(P/R). Plugging in the given values, I = √(50 watts / 2 ohms) = √25, which equals 5 Amperes.

Question 5

The voltage unit is:

Accepted Answer

Volt

Answer

The Volt (V) is the standard SI unit for electric potential difference, commonly referred to as voltage. It quantifies the energy per unit electric charge, representing the force that drives electric current through a circuit.

Amazon Practice Test

Amazon Practice Test

Free Amazon Maintenance Technician: Math Ohm's Law Question and Answers 1