Problem

A device uses an electric current of 2 Amperes when connected to a power supply of 12 Volts. How much electrical power does the device use?

Answer

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Answer

Step 3: Calculate the power. Multiplying 2 by 12 gives 24, so the device uses 24 Watts of power.

Steps

Step 1 ：Step 1: Write down the formula for electrical power. The formula for electrical power is \(P=IV\), where \(P\) is the power in Watts, \(I\) is the current in Amperes and \(V\) is the voltage in Volts.

Step 2 ：Step 2: Substitute the given values into the formula. Substituting \(I=2 \, A\) and \(V=12 \, V\) into the formula gives \(P = 2 \times 12\).

Step 3 ：Step 3: Calculate the power. Multiplying 2 by 12 gives 24, so the device uses 24 Watts of power.

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