Question

Найти работу электрического тока за 20 минут, если сила тока в цепи равна 4 А, а сопротивление паяльника равно 30 Ом, Чему равно количество теплоты, которое выделится в паяльнике за это время? В ответ запишите чему равно Q.

Answer 1

Ответ: 576кДж

Объяснение:

Дано:

R=30 Ом

I=4А

t=20мин=1200с

--------------------

Q-?; А-?

А=Q=I²Rt=4²*30*1200=576000Дж=576кДж

Answer 2

Calculation of Heat Generated in the Soldering Iron

To find the amount of heat generated in the soldering iron, we can use the formula:

Q = I^2 * R * t

Where: - Q is the amount of heat generated (in joules) - I is the current flowing through the circuit (in amperes) - R is the resistance of the soldering iron (in ohms) - t is the time for which the current flows (in seconds)

Given: - Current (I) = 4 A - Resistance (R) = 30 Ω - Time (t) = 20 minutes = 20 * 60 seconds = 1200 seconds

Substituting the given values into the formula, we can calculate the amount of heat generated:

Q = (4 A)^2 * 30 Ω * 1200 s

Calculating the expression:

Q = 4^2 * 30 * 1200

Q = 16 * 30 * 1200

Q = 576,000 joules

Therefore, the amount of heat generated in the soldering iron during this time is 576,000 joules.