What amount of heat will be released in a 50 Ohm rheostat in 2 minutes with a current in the circuit of 2 A?
| May 11, 2021 | education
Initial data: R (rheostat resistance) = 50 Ohm; t (time of movement of electric current through the rheostat) = 2 min; I (current in the circuit) = 2 A.
SI system: t = 2 min = 2 * 60 s = 120 s.
The amount of heat that is released on the rheostat can be calculated using the Joule-Lenz law: Q = I ^ 2 * R * t.
Let’s calculate: Q = 2 ^ 2 * 50 * 120 = 24000 J or 24 kJ.
Answer: 24 kJ of heat will be released on the rheostat.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
