Determine the power of the current in the electric lamp if at a voltage of 3 V the current strength in it is 100 mA.

To find out the required current power in the used electric lamp, consider the formula: Px = I * U, where I is the current in the used electric lamp (I = 100 mA = 100 * 10-3 A); U is the operating voltage (U = 3 V).

Let’s calculate: Px = I * U = 100 * 10-3 * 3 = 0.3 W.

Answer: The power of the current in the used electric lamp, according to the calculation, is 0.3 W.