Question

Сколько теплоты выделится за 1.5 мин в электрической печи, включенной в сеть силой тока 4 А если сопротивление печи равно 30 om

Answer 1

1,5 мин = 90 c 
количество теплоты Q = I² R t = 16* R * 90 = 1440 R Дж 

Answer 2

Calculating Heat Generated by Electric Oven

To calculate the heat generated by the electric oven, we can use the formula:

Heat (Q) = I^2 * R * t

Where: - I = current (in amperes) - R = resistance (in ohms) - t = time (in seconds)

Given: - Current (I) = 4 A - Resistance (R) = 30 ohms - Time (t) = 1.5 minutes = 90 seconds

Calculation

Using the given values in the formula:

Heat (Q) = (4 A)^2 * 30 ohms * 90 s

Heat (Q) = 16 A^2 * 30 ohms * 90 s

Heat (Q) = 43200 joules

So, the heat generated by the electric oven in 1.5 minutes is 43200 joules.