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

Question 1: The following phrase accurately summarizes Ohm's law:

I = R/V
R = VI
V = R/I
V = IR (Correct answer)

Correct answer: V = IR

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:

0.5 A (Correct answer)
2 A
50 A
10 A

Correct answer: 0.5 A

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:

2 Ω
10 Ω (Correct answer)
5 Ω
50 Ω

Correct answer: 10 Ω

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.

2 A
10 A
5 A (Correct answer)
50 A

Correct answer: 5 A

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:

Ampere
Coulomb
Watt
Volt (Correct answer)

Correct answer: Volt

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.

Question 6: The current unit is:

Ampere (Correct answer)
Coulomb
Watt
Volt

Correct answer: Ampere

The Ampere (A) is the standard SI unit of electric current. It measures the rate at which electric charge flows past a point in an electrical circuit, with one ampere defined as one coulomb of charge passing per second.

Question 7: The power unit is:

Ampere
Coulomb
Watt (Correct answer)
Volt

Correct answer: Watt

The Watt (W) is the standard SI unit of power, which measures the rate at which energy is transferred or converted. In electrical systems, it quantifies the rate at which electrical energy is consumed or produced, representing one joule per second.

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

The following phrase accurately summarizes Ohm's law: