what is ratio?

Question

what is resistance in ratio?

Answer 1

Electrical resistance is a measure of the degree to which an object opposes the passage of an electric current. The SI unit of electrical resistance is the ohm. Its reciprocal quantity is electrical conductance measured in siemens.

The quantity of resistance in an electric circuit determines the amount of current flowing in the circuit for any given voltage applied to the circuit.

R = \frac{V}{I}

where

R is the resistance of the object, usually measured in ohms, equivalent to J·s/C2
V is the potential difference across the object, usually measured in volts
I is the current passing through the object, usually measured in amperes

Answer 2

Ohm's Law states E=IR, or E (Voltage drop)= I (current in amperes) X R (resistance in "Ohms" of the circuit measured). RATIO is the relation between two quantities expressed as one divided by the other (A:B, A/B, or the resulting decimal value). In the formula, E=IR, You want R expressed by itself, so you must eliminate the "I" with a little algebra. BTW, that's a capital "i." Divide both sides by I and the new formula is the ratio of voltage drop/current:

E=IR
R=E/I (or E:I, the more common way to express ratio)

Ohm's law is used in DC (direct Current). AC (Alternating Current) is more complicated with sine, cosine, phase shift, etc. Ratio is used in many areas. New freshmen to graduating seniors might be 100:20, or 5:1 (pretty sad). In coin collecting, a Morgan silver dollar had 90% soft silver to 10% harder copper, i.e.: 90:10 = 9/1 ratio. The QUANTITY varied for silver from dime to quarter to half dollar to dollar, but the RATIO was constant 9:1 because the quantity of copper varied at the same rate.

One more ratio as a decimal: 1 kilometer = 0.62 mile. A handy ratio if you remember 100km is approx. 60 miles.

Answer 3

Resistance can be defined as the opposition to current flow. Electrical resistance is a measure of the degree to which an object opposes the passage of an electric current. The SI unit of electrical resistance is the ohm. Its reciprocal quantity is electrical conductance measured in siemens.

The quantity of resistance in an electric circuit determines the amount of current flowing in the circuit for any given voltage applied to the circuit.

R = V/I
where

R is the resistance of the object, usually measured in ohms, equivalent to J·s/C2
V is the potential difference across the object, usually measured in volts
I is the current passing through the object, usually measured in amperes

Answer 4

Ohms in electrical applications.