The question is asking us to identify the formula that does not represent electrical power.

Option 1: I2 R - This formula represents electrical power, where I is the current flowing through a circuit and R is the resistance. Multiplying current squared by resistance gives the power.

Option 2: I R2 - This formula does not represent electrical power. It includes the current and resistance, but the resistance is squared while the current is not. Therefore, it does not correctly calculate the power.

Option 3: V I - This formula represents electrical power, where V is the voltage applied to the circuit and I is the current flowing through the circuit. Multiplying voltage by current gives the power.

Option 4: V2/R - This formula represents electrical power, where V is the voltage applied to the circuit and R is the resistance. Dividing the voltage squared by resistance gives the power.

Therefore, the correct answer is Option 2, as it does not accurately calculate electrical power.