Write a correct expression for ohm's law ?

Options

A. `V= I + R`
B. `V= I-R`
C. `V= 1// I +R`
D. `V= I **R`

Explanation

To write a correct expression for Ohm's Law, we can follow these steps:

### Step 1: Understand the relationship in Ohm's Law
Ohm's Law states that the potential difference (voltage) across a conductor is directly proportional to the current flowing through it, provided that the temperature and material of the conductor remain constant.

### Step 2: Define the variables
- Let \( V \) be the potential difference (voltage) across the resistor.
- Let \( I \) be the current flowing through the resistor.
- Let \( R \) be the resistance of the resistor.

### Step 3: Write the proportionality statement
According to Ohm's Law:
\[ V \propto I \]
This means that voltage \( V \) is proportional to the current \( I \).

### Step 4: Introduce the constant of proportionality
To convert the proportionality into an equation, we introduce a constant of proportionality, which is the resistance \( R \):
\[ V = I \cdot R \]

### Step 5: Final expression
Thus, the correct expression for Ohm's Law is:
\[ V = I \cdot R \]

### Conclusion
From the given options, the correct expression for Ohm's Law is \( V = I \cdot R \).

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