You're almost there! To calculate power, we need both voltage and current.

Here's how to do it:

Formula:

Power (P) = Voltage (V) x Current (I)

Given:

* Resistance (R) = 10 ohms

* Current (I) = 2 amps

To find the Voltage (V), we can use Ohm's Law:

Voltage (V) = Resistance (R) x Current (I)

V = 10 ohms * 2 amps

V = 20 volts

Now we can calculate the power:

Power (P) = Voltage (V) x Current (I)

P = 20 volts * 2 amps

P = 40 watts

Therefore, the power of the circuit is 40 watts.