Work required to get current going

In summary, the work required to get current going is the energy needed to overcome resistance in a circuit and allow electric current to flow. This work is affected by factors such as circuit resistance, applied voltage, and conducting material. It can be calculated by multiplying voltage and charge, and is directly proportional to the amount of current flowing. Understanding this concept is crucial in understanding energy transfer in circuits and designing efficient electrical systems.
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Pushoam
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Image from Griffith, ED, 4th ed

Wm is the work needed against the back emf. If the current is steady (meaning not changing w.r.t. time) then there is no back emf. Hence, Wm = 0. But, B due to steady current is not 0. So, R.H.S is not zero. Could anyone please resolve this inconsistency?
 
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to get that state of steady current from 0 current at some point you had to have changing current so that energy is now stored in the wm but of course now that is steady no addition wm is being stored.
 
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1. What is "work required to get current going"?

The work required to get current going refers to the amount of energy needed to start the flow of electric current in a circuit. It is also known as the initial energy or activation energy.

2. How is the work required to get current going calculated?

The work required to get current going can be calculated by multiplying the voltage of the power source by the amount of charge (in coulombs) that passes through the circuit. This can also be represented by the formula W = QV, where W is the work, Q is the charge, and V is the voltage.

3. Why is the work required to get current going important?

The work required to get current going is important because it is necessary to overcome the resistance in a circuit and allow the flow of electric current. Without enough initial energy, the current will not be able to start flowing.

4. How does the work required to get current going affect the overall current in a circuit?

The work required to get current going is directly proportional to the amount of current in a circuit. This means that the higher the work required, the higher the current will be. Conversely, if the work required is too low, the current may not be strong enough to power the circuit.

5. What factors can affect the work required to get current going?

The work required to get current going can be affected by various factors such as the type and quality of the power source, the resistance of the circuit, and the type of material used for the conductors. Temperature and external forces can also play a role in the amount of work required.

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