Power (P) = Voltage (V) x Current (I) In this case, the voltage (V) is 1.5 volts, and the current (I) is 10 milliamps. However, it's important to remember that power should be calculated in watts (W), so we need to convert milliamps to amps: 1 milliamp (mA) = 0.001 amp (A) So, 10 milliamps (10 mA) is equal to 0.01 amps (0.01 A). Now, we can calculate the power: P = V x I P = 1.5 V x 0.01 A P = 0.015 watts So, the power delivered by the device is 0.015 watts, which is equivalent to 15 milliwatts (mW)