Resistance
is potential difference per unit current and the equation is:
Resistance =
potential difference/current
Therefore resistance
must be measured in volts per ampere. The SI unit is known as ohm. We use the
capital Greek letter (omega) Ω to represent it.
So if a
component has a potential difference of 4V and a current of 2A, the resistance
would be:
4/2=2Ω (ohms)
When an
electron moves across a wire, resistance is produced because the electron does
not take a straight route through it. It will have lots of collisions and that
will cause resistance. Resistance is a hindrance to the flow of charge.
What is it that the electrons are having collisions with? Does the value of the current or the length of the wire affect the number of collisions? If so how? and why?
ReplyDeleteHow to make money at online casinos: 5 tips to improve your gambling
ReplyDelete5 tips to improve 온카지노 your gambling skills · 2. Start by taking หารายได้เสริม a few simple steps to make money · 3. Understand the rules of how to play · 4. 메리트카지노 Start with some