Current balances & Electromagnet Induction

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SUMMARY

The discussion centers on calculating the applied force required to move a conducting bar along frictionless rails in a 2.50T magnetic field, while also determining energy dissipation in a 6.00-ohm resistor. The bar, with a length of 1.20m, must maintain a constant speed of 2.00m/s. Key calculations include the applied force, energy dissipation rate, and power output when the speed is doubled. The resistance of the conducting bar is also questioned, highlighting the importance of understanding electromagnetic induction principles in this scenario.

PREREQUISITES
  • Understanding of electromagnetic induction principles
  • Familiarity with Ohm's Law and power calculations
  • Knowledge of magnetic fields and their effects on conductors
  • Basic physics concepts related to motion and forces
NEXT STEPS
  • Calculate the applied force using the formula F = BIL, where B is the magnetic field strength, I is the current, and L is the length of the bar.
  • Learn about energy dissipation in resistors and how to calculate it using P = I²R.
  • Explore the effects of changing speed on power output in resistive circuits.
  • Investigate the concept of induced electromotive force (EMF) in moving conductors within magnetic fields.
USEFUL FOR

Physics students, electrical engineers, and educators seeking to deepen their understanding of electromagnetic induction and its applications in circuit analysis.

PurpleMist
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I am doing a question about Current balances & Electromagnet Induction and i cnat seem to figure out a few thing and i was hoping someone could help me, so here is the question:

A conducting bar moves to the right along parallel,frictionless conducting rails connected on one end by a 6.00ohm resistor. A 2.50T magnetic field is directed into the paper. The length is 1.20m and the mass of the bar is negligible.

*calculate the applied force that is necessary to move the bar to the right at a constant speed of 2.00m/s.

*determine the rate at which energy dissipated in the resistor.

*calculate the power outputted by the resistor if the speed of the rod is doubled.
 
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What paper? Where is it? on the back of the conductor, underneath it, beside it??

What is the resistance of the conducting bar?

Where is the field applied and how? I ask, because if it is induced across the rails by a voltage that conducting bar sitting on those frictionless rails is going to go west in a real hurry.
 

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