current ?..if we apply voltage difference......?

Question

if we apply voltage difference between two points current is produced...then what is voltage how can you make difference in it between two points......plz explain me clearly....
how we make change in voltage between two ends this is my question..?

Answer 1

*** sorry ****

Answer 2

Voltage is the measure of charge accumulated at the point and Voltage Difference is the difference of the charge accumulated at the two points.

If one point has 10 electrones and another one has 10 positive holes. There's a potential difference and if u connect the two points with a conductor the electrones will flow to fill the holes and this will form a current as soon as the charges are balanced and equalised the current will stop and the Voltage at the two points will be same.

So u can create a voltage difference by giving positive or negative charge to a point.

And remember U cant measure Voltage. u can only measure Voltage Difference b/w two points.

Answer 3

The two points would be like the two terminals on a battery, or the two prongs of an electrical outlet. Power can be created various ways, like a generator, or chemical energy in the battery.



Power (watts) = voltage times current. voltage is like pressure, current (amps) is like flow. The amount of current that flows will depend how much "resistance" the electrical circuit has (amps= volts/R). They are called circuits because the current flows thru in a loop (or could have multiple loops). Current flows from one battery terminal, thru the "circuit" and back into the other battery terminal

Answer 4

You are correct that voltage is like water pressure and current is like water current (in a hose). In a DC circuit, a battery has a certain value of electrical pressure at its teminals (usually 12 volts for a car battery). Wiring usually has negligible resistance (so as to not waste energy). A component (such as a head light) is like a valve (resistor) that controls the flow of electrons (current). In a simple DC circuit, one volt (pressure) will cause one amp (current) if the resistor (valve) equals one Ohm. The formula E = IR (voltage = current x resistance) can be used to calculate E, I or R if the other two values are known.

Answer 5

when electrons move through a conductor current is formed.

now, consider a point A in space which contains a positive charges, a electric field will be formed around it . now consider two points in this electric field B and C which are in a straight line. A positive charge Q at point C has to be moved to point B. The electric field will exert an opposition to this. so,a force(F) is necessary to move charge Q from point c to b. Now, the the work done in moving the charge Q from C to B is potential difference. v= F/Q. the potential is different for the charge Q at B and C .. V = Vc -- Vb

Answer 6

transformer