Question

Определите мощность тока в электрической лампе если по напряжении 3 В сила тока в ней равна 100 мА

Answer 1

CИ: I=100*10^-3 А=0.1 А
U=3В
P=?
РЕШЕНИЕ:
P=UI
P=0.1 А*3 В=0.3 Вт
Ответ: Р=0,3 Вт

Answer 2

Calculating Electric Current in a Light Bulb

To determine the electric current in an electric lamp given a voltage of 3V and a current of 100mA, we can use the formula I = U / R, where I represents the electric current, U represents the voltage, and R represents the resistance of the lamp.

Using the given values: - Voltage (U) = 3V - Current (I) = 100mA = 0.1A

We can rearrange the formula to solve for resistance (R): R = U / I

Substitute the given values into the formula: R = 3V / 0.1A = 30Ω

Therefore, the resistance of the electric lamp is 30 ohms

Conclusion

The electric current in the electric lamp, given a voltage of 3V and a current of 100mA, can be calculated to be 0.1A using the formula I = U / R, where U is the voltage and R is the resistance of the lamp. The resistance of the lamp is found to be 30 ohms.