what's the difference between current and voltage/potential difference?

Question

resistance of a wire work. if the voltmeter is put in parrallel of the resistance wire, what is the voltage recognising/reading?

also, what could happen when performing an electrical experiment?

thanks

Answer 1

Voltage used to be called "electromotive force," i.e., that which causes current to flow. So, if there's nothing to generate a voltage, there will be no current.

http://en.wikipedia.org/wiki/Voltage
http://en.wikipedia.org/wiki/Electric_current

If you are not careful, you can get shocked, injured, or killed playing with high voltages.

http://en.wikipedia.org/wiki/Electric_shock

Answer 2

arbiter0… gave you 2 good answers. About your other question: >>if the voltmeter is put in parrallel of the resistance wire, what is the voltage recognising/reading

What the voltmeter will measure is the voltage across the wire. The voltage measured is the current through the wire times its resistance. For most wire the resistance is almost zero so the voltage across it will be almost zero unless the current is huge.

Answer 3

the common water analogy

current is the amount of water flowing

voltage is the water pressure.

Answer 4

WIDE, OPEN,