# Tag Info

### What happens inside a conducting wire if it is placed in an electric field?

If the field is static, the conductor will be equipotential in the equilibrium state. If you bring the conductor in the field from a region with no field or with a different value of the field there ...

### Why Does an Electric Field Arise In This Situation?

The problem lies in the measurement method, not in the medium itself. As soon as you connect the battery, you will always have an electric field (actually also if you do not connect the battery), no ...

### Why Does an Electric Field Arise In This Situation?

Water conducts electricity, so the battery drives a steady current through the water. There is therefore a current desity $${\bf j}= \sigma {\bf E}= - \sigma \nabla \phi$$ where $\sigma$ is the ...

### How to understand the model of electric current and potential in circuits?

It is not the electrons themselves that carry the energy in the circuit. They do not gain any energy overall in the battery, and nor do they lose any in the resistor, overall. The electrons undergo ...

### Voltmeter reading in a bridge circuit

Instead of presenting a solution, I'd like to point out where you're going the wrong way. You're talking about "the" resistance and "the" current, as if there were only one ...

1 vote

### Will a surface perpendicular to the electric field always be equipotential

In the case of electrostatic fields indeed equipotential surfaces are perpendicular to the electric field. In other cases the vector potential should also be considered.
1 vote
Accepted

### How to find the potential difference between two charged spheres?

If $a - b = c$ then it implies $b-a = -c$ so both of your propositions are equivalently correct.
1 vote
Accepted

### $V$-$I$ characteristics and circuits

The slope of the $I\ \text{against}\ V$ curve gives the reciprocal of the so-called 'slope resistance', $\frac{dV}{dI}$. This can be a useful concept, but it's not relevant here. Here are some hints ...
1 vote

### Confusion about electrical potential difference

I'm not sure if I understand your question correctly, however I assume your talking about the potential difference across each of the 2 distinct paths being constant. You can think of it as "...
1 vote
Accepted

### Confusion about electrical potential difference

The energy loss of a specific charge (like an electron) on passing through a resistor depends not on the resistance, but on the voltage difference. That voltage difference itself depends on the ...
1 vote

### Voltage and series circuit

In a series circuit, the voltages are different when the resistances are different If $U$ is the total voltage across both resistances, the drop over the fist one will be $U_1=\frac{R_1}{R_1+R_2 } U$ ...

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