Question

P1=100Вт; U=220В Р2=25Вт ------------------------------ I1/I2-?

Answer 1

Согласно формулы определения мощности электрического тока

$P=U*I$

Откуда

$I_{1}=\frac{P_{1} }{U}=\frac{100}{220}= 0,454A\\I_{2}=\frac{P_{2} }{U}=\frac{25}{220}=0,1136A\\\frac{I_{1} }{I_{2}}=\frac{0.454}{0.1136}=\frac{4}{1}$

Второй вариант

$I_{1}=\frac{P_{1} }{U},I_{2}=\frac{P_{2}}{U}\\\frac{I_{1} }{I_{2} }=\frac{\frac{P_{1} }{U} }{\frac{P_{2} }{U} }=\frac{P_{1} }{P_{2} }=\frac{100}{25}=\frac{4}{1}$

Answer 2

To find the ratio of currents I1 and I2, we can use the power formula for electrical circuits:

Power (P) = Voltage (U) × Current (I)

For each power value, we can rearrange the formula to solve for the corresponding current:

For P1: I1 = P1 / U = 100 W / 220 V ≈ 0.4545 A For P2: I2 = P2 / U = 25 W / 220 V ≈ 0.1136 A

Now, we can find the ratio of I1 to I2:

I1 / I2 ≈ 0.4545 A / 0.1136 A ≈ 4

So, the ratio of I1 to I2 is approximately 4.