Question

Сколько теплоты выделяется за 30 секунд в реостате с сопротивлением 100 ом при силе тока в цепи 2А

Answer 1

Закон джоуля ленца.

Answer 2

Calculating Heat Generated in a Resistor

To calculate the heat generated in a resistor, we can use the formula:

Q = I^2 * R * t

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

Given: - I = 2A - R = 100 ohms - t = 30 seconds

Using the provided values, we can calculate the heat generated in the resistor.

Q = (2A)^2 * 100Ω * 30s

Q = 4A^2 * 100Ω * 30s

Q = 400 * 30 Joules

Q = 12000 Joules

So, 12000 Joules of heat is generated in the resistor over 30 seconds when the current in the circuit is 2A and the resistance is 100 ohms.