Question

- Во сколько раз сопротивление R, лампы, рассчитан- ной на напряжение U = 220 В, должно отличаться от сопротивления R2 лампы такой же мощности, рассчитанной на напряжение U2 = 127 В?​

Answer 1

Ответ:

в три разаразаразараза

Объяснение:

Answer 2

Calculating Resistance for Different Voltages

To calculate the resistance for a lamp at different voltages, we can use the formula:

R = (U^2) / P

Where: - R = resistance - U = voltage - P = power

Let's calculate the resistance for the lamp at 220V and 127V.

For the lamp at 220V: R1 = (220^2) / P1 For the lamp at 127V: R2 = (127^2) / P2

Comparing the Resistances

Now, let's compare the resistance for the lamp at 220V and 127V.

R1 = (220^2) / P1 R2 = (127^2) / P2

To find the ratio of the resistances, we can use the following formula:

R1 / R2 = (220^2 / P1) / (127^2 / P2)

This will give us the factor by which the resistance at 220V should differ from the resistance at 127V for lamps of the same power.

Conclusion

The ratio of the resistance for a lamp at 220V to the resistance for a lamp at 127V, both of the same power, can be calculated using the above formula. This will provide the exact factor by which the resistances should differ.