The discussion revolves around calculating the induced electromotive force (emf) in a rotating rod with mass, focusing on the relationship between torque and induced current. The user initially calculated the induced emf and torque but sought guidance on determining the current and the relationship between torque and emf. The conversation emphasizes the importance of understanding torque balance, specifically that the torque due to gravitational force (mg) is balanced by the torque from the induced current. The correct interpretation of the equation IBL as a force rather than torque is also clarified.
PREREQUISITESStudents and professionals in physics, particularly those focusing on electromagnetism and rotational dynamics, as well as engineers working with rotating machinery and electrical systems.
it means that there is not external torque that is torque of mg is balanced by torque of induced current.kuruman said:
i have shown how much i have proceeded far.Now i cannot do it further.kuruman said:
And where is the equation that says that? Parenthetically, there are two external torques. What you meant to say is that there is no net torque. Right? This is a torque balance problem. What does one normally do with such problems? Hint: Free body diagram.Physics lover said:
ok i think i got that.The emf to be find out will have its own torque =IBL which will balance the torque of mg and induced current.Am i right?kuruman said:
You are right except that IBL is a force, not a torque.Physics lover said: