Question

Лампа сопротивление спирали которой 440 ом включена в цепь с напряжением 220в. какой силы ток идёт по лампе

Answer 1

I=u/R
I=440Ом/220В=2A

Answer 2

Calculation of Current in the Lamp Circuit

To calculate the current flowing through the lamp, we can use Ohm's Law, which states that the current (I) flowing through a circuit is equal to the voltage (V) divided by the resistance (R). In this case, the voltage is 220V and the resistance of the lamp's spiral is given as 440 ohms.

Using Ohm's Law, we can calculate the current as follows:

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

Substituting the given values:

Current (I) = 220V / 440 ohms

Simplifying the equation:

Current (I) = 0.5 Amperes

Therefore, the current flowing through the lamp is 0.5 Amperes.

Please note that the calculation assumes the lamp operates under ideal conditions and that the resistance remains constant.