How will the amount of heat released in the spiral of an electric lamp change if both
January 10, 2021 | education
| How will the amount of heat released in the spiral of an electric lamp change if both the current in the lamp and the voltage across it are doubled.
Joule-Lenz law for the amount of heat released on a conductor:
Q = U * I * t
It can be seen from this that with an increase in both the current in the lamp and the voltage by 2 times, the amount of heat released will increase by 4 times:
Q2 / Q1 = [(2 * U) * (2 * I) * t] / (U * I * t) = 4.
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.