When no current flows in a stationary conductor, the continual orbiting and jostling of these particles lead to no resultant large-scale movement of either positive or negative charge one way or another. If an electric cell is connected in a closed circuit of conductors, the cell tends to ...
Current without potential difference 电路短路时,电池正极和负极之间的电位差虽然在理想情况下应该接近于0,但在实际情况下仍然会有一些电位差存在。这些电位差和电流的产生有几个主要原因: 1. 电池内阻 电池并不是一个理想的电源,它具有内阻。当电池短路时,电流会通过电池的内阻产生一个小的电位差。这就解释了为什...
Answer to: For the circuit shown in the figure, find the current through, the potential difference across,and the power dissipated by each...
where I is the current in amperes, V is the potential difference between two points of interest in volts, and R is a circuit parameter, measured in ohms (which is equivalent to volts per ampere), called the resistance. Ammeter Operation – Today’s ammeters have an internal resistance to ...
Current through the circuit=30muA Potential drop across 20Omega =(30xx10^(-6))xx20=600xx10^(-6)V=0.0006V Potential drop across p-n junction =6-0.0006 =5.9994V~~6V
Two resistors, 17.0 ohms and 7.1 ohms are connected in parallel across a 6.00 V battery. Find the potential difference across each resistor. When a pair of identical resistors are connected in series which of the following is the same for both resistors: voltage across each, p...
However, the waveform of the AC output voltage and phase are subjected to the load angle. 3. For the RL load on the AC side, the DC source provides reactive power to the load. The DC side current does not change flow direction when the reactive power is fed back to the supply. ...
Electric Power P watts Amperage I amps Voltage V volts P = I × V I = P / V V = P / I Ohm's law. V = I × R, where V is the potential across a circuit element, I is the current through it, and R is its resistance. This is not a generally applicable definition of ...
Where I is the current in amperes, V is the potential difference in volts, and R is a constant, measured in ohms, called the resistance. Current is directly proportional to voltage loss through a resistor. That is, if the current doubles, then so does the voltage. To make a current flo...
Let the battery apply a potential difference of {eq}V=6\:volts {/eq} and let the bulb have an internal resistance of {eq}R=2\:ohms {/eq}. Then, the direct current through the bulb when it is connected to the battery is given by {eq}\mathrm{I_{DC}=\frac{V}{R}=\frac{6}{...