All Questions
Tagged with electric-circuits work
7
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Why is Power = Voltage $\times$ Current?
So P = I*V because V is the amount of energy per coulomb and I is the amount of electrons going past a cross sectional area in one second.
So if we do the math, since V = J/C and I = C/sec, if we ...
- 191
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4
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Work done by magnetic field on current carrying conductor
Suppose a wire of length L carrying a current I is kept in a uniform magnetic field B perpendicular to the current. The force on the wire will be IBL and work done by magnetic force when wire moves a ...
- 303
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1
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Energy stored in a capacitor vs Work that the battery does [duplicate]
Say we have a battery at a fixed voltage of $V$ charging a capacitor with capacitance $C$.
When the capacitor is fully charged, the energy stored in it will be $\frac{1}{2}QV$, where $V$ is the final ...
- 3,075
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What does electric potential mean in a circuit?
As we know that electric potential at a point is defined as a work done by me to carry unit charge from infinity to that point. How can I use this definition in an electric circuit that contains a ...
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3
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Why doesn't potential difference across circuit increase when length of wire increases?
Since $V=Ed$, why doesn't the electric potential increase when length of the wire increases. $d$ increases right? Is it because the battery only pushes the electrons from one terminal to the other and ...
- 295
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vote
2
answers
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Working of battery in circuit
The battery has a potential difference. So, shouldn't battery generate an electric field directing from the positive side to the negative side? If that's the case, we know that potential in a wire(...
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When talking about potential difference in a circuit, whose work done are we talking about?
I'm asking this because it seems to me that when we talk about PD around a charge (i.e. potential difference between infinity and a point), we're talking about the work done per unit charge by an ...
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