Ohm's Law Physics Example 1

Follow the full solution, then compare it with the other examples linked below.

Example 1

easy
A 12 V12 \text{ V} battery is connected to a 4 Ω4 \text{ } \Omega resistor. What current flows?

Solution

  1. 1
    Apply Ohm's law: I=VRI = \frac{V}{R}.
  2. 2
    Substitute the values: I=124I = \frac{12}{4}.
  3. 3
    I=3 AI = 3 \text{ A}

Answer

I=3 AI = 3 \text{ A}
Ohm's law (V=IRV = IR) is the fundamental relationship in circuit analysis. It connects voltage, current, and resistance in a simple linear relationship.

About Ohm's Law

The fundamental relationship stating that the voltage (VV) across an ohmic conductor equals the current (II) flowing through it multiplied by its resistance (RR).

Learn more about Ohm's Law →

More Ohm's Law Examples

Example 2 medium

A heater draws [formula] from a [formula] supply. What is its resistance, and how much power does it

Example 3 medium

What voltage is needed to push [formula] through a [formula] resistor?

Example 4 medium

A resistor in a circuit has a current of [formula] flowing through it when connected to a [formula]

← All Ohm's Law Examples Ohm's Law Concept