Electrons through wire work physics problem

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SUMMARY

The discussion centers on calculating the rate of work done on an electrical device when electrons flow through it. Given a flow rate of 5 x 1019 electrons per second and a potential difference of -3 Volts, the power can be determined using the formula Power = Voltage x Current. The current is calculated using the equation Current = n * e / dt, where n represents the number of electrons, e is the elementary charge, and dt is the time interval of 1 second. The solution requires applying these equations to find the work done per unit time.

PREREQUISITES
  • Understanding of electric potential difference and its implications in circuits.
  • Familiarity with the concept of current and its calculation using electron flow.
  • Knowledge of the relationship between power, voltage, and current in electrical systems.
  • Basic understanding of elementary charge (e) and its significance in physics.
NEXT STEPS
  • Study the derivation and application of the formula Power = Voltage x Current in electrical circuits.
  • Learn how to calculate current using the equation Current = n * e / dt in practical scenarios.
  • Explore the concept of electric potential and its role in determining the behavior of electrons in circuits.
  • Investigate the relationship between work, energy, and power in electrical systems for deeper insights.
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Students studying physics, particularly those focusing on electricity and magnetism, as well as educators seeking to clarify concepts related to electric current and power calculations.

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Homework Statement


Electrons move in a wire in the direction shown through an electrical device at the rate of 5*10^19 electrons per s. If the two ends of the device are at different electric potentials, V(a)-V(b)=-3 Volts, and if the electrons emerge at the same speed with which they entered, then the rate at which work is being done on the device is?

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Homework Equations



?

The Attempt at a Solution


I'm just not sure what the equation for work would be here, even though I probably already know it and can't remember but I didn't see it in my physics book either.
 
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Rate of doing work = power = V*I
Current = dQ/dt = n*e/dt.
N is given, e is known and dt = 1 s. Find W.
 

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