How do you explain ohms law?

Question

How do you explain ohms law?

Answer 1

Consider you have

a) A faucet

b) A Pipe

c) Water

Your faucet is your Voltage source, the more water(current) it comes out , the more voltage

Your pipe is your circuit; the wider the pipe, the less resistence for the water to flow

Water is your current.

Now we have: Water flowing in Pipe (I) = Water from faucet (V)/ Pipe's width (Resistance)

If the pipe is narrow (lots of resistance), the water flow is smaller.   If the faucet outputs more water, you get more water out of the pipe.  You got the idea.

Answer 2

Ohm's law applies to electrical circuits; it states that the current passing through a conductor between two points is directly proportional to the potential difference (i.e. voltage drop or voltage) across the two points, and inversely proportional to the resistance between them.

The mathematical equation that describes this relationship is:

V = IR

where V is the potential difference between two points of interest in volts, I is the current in amperes, and R is a circuit parameter, measured in ohms (which is equivalent to volts per ampere), and is called the resistance. The potential difference is also known as the voltage drop, and is sometimes denoted by U, E or emf (electromotive force) instead of V.[1]

The law was named after the physicist Georg Ohm, who, in a treatise published in 1827, described measurements of applied voltage and current passing through simple electrical circuits containing various lengths of wire. He presented a slightly more complex equation than the one above to explain his experimental results. The above equation is the modern form of Ohm's law.

The resistance of most resistive devices (resistors) is constant over a large range of values of current and voltage. When a resistor is used under these conditions, the resistor is referred to as an ohmic device (or an ohmic resistor) because a single value for the resistance suffices to describe the resistive behavior of the device over the range. When sufficiently high voltages are applied to a resistor, forcing a high current to flow through it, the device is no longer ohmic because its resistance, when measured under such electrically stressed conditions, is different (typically greater) from the value measured under standard conditions (see temperature effects, below).

Ohm's law, in the form above, is an extremely useful equation in the field of electrical/electronic engineering because it describes how voltage, current and resisitance are interrelated on a macroscopic level, that is, commonly, as circuit elements in an electrical circuit. Physicists who study the electrical properties of matter at the microsopic level use a closely related and more general vector equation, sometimes also referred to as Ohm's law, having variables that are closely related to the I, V and R scalar variables of Ohm's law, but are each functions of position within the conductor.

Answer 3

HI if u mean electric law (ohm law)

V=IR  

by V= Voltage

I= Current of electric

R= Resistance

Example. You have voltage of electric 220 volt and current 50 Amp determine Resistance.

from formula V=IR

220/50=4.4 ohm

explain if R(Resistance) More I(current) flow pass conductor difficult same water flow pass pipe if surface pipe rugged water flow difficult because it has resistance.