Resistance is the relationship between the current and the resistance

The resistance value is a physical property and is regarded as a fixed property, and the current is the strain variable that the voltage is applied to the resistance, so Ohm's law is written as i=u r

This r should be regarded as the sum of resistor, impedance, and capacitive impedance.

Function relation r squared pure resistance value squared capacitive impedance squared|

The resistance of the resistor has nothing to do with the current, r = l s ( represents the resistivity of the resistor, which is determined by its own properties, l represents the length of the resistor, and s represents the cross-sectional area of the resistor).

The magnitude of the resistance value of a resistive element is generally related to temperature.

The current in the wire is not determined by the resistance of the wire, but by the load. Only in the event of a load short-circuit is the short-circuit current determined by the resistance of the wire (in which case the load resistance is 0).

When fixed with electrical appliances, the resistance is not affected by the current because the resistance is a property specific to the object, and Ohm's law is the relationship between the current and the voltage resistance, which needs to be noted.

Resistance is a property of the conductor itself, and it has nothing to do with the current passing through, the size of the resistance depends on the material, length, cross-sectional area of the conductor itself, and is also affected by temperature Do you understand?

Resistance is determined by the intrinsic properties of the conductor and is related to the length, thickness, and material of the conductor.

Is it the relationship between resistance and current, isn't it r=u i?

Could it be a deeper problem?

The higher the resistance, the smaller the current, and the smaller the resistance, the greater the current.

r=u/i;r=p/(i*i);

You should ask specific questions.

When the voltage at both ends of the conductor is constant, the current flowing through the conductor is inversely proportional to the conductor resistance.

The formula for the relationship between current, voltage and resistance is: i=u r, where i is the current, u is the voltage, and r is the resistance. From the above formula, it can be seen that when the voltage is constant, the larger the current, the smaller the resistance, and vice versa, the smaller the current, the greater the resistance.

Scientifically, the amount of electricity passing through any cross-section of a conductor per unit of time is called current intensity, referred to as current. It is usually denoted by the letter i, and its unit is amperes. The SI unit of electric current, the ampere, is named after its surname), abbreviated as "ampere", and the symbol "a", also refers to the directional movement of electric charges in a conductor.

The free charge in the conductor moves regularly and directionally under the action of the electric field force to form an electric current. The white in the conductor is formed by the regular directional motion of the electric charge under the action of the electric field force.

The electromotive force of the power supply forms a voltage, and then generates an electric field force, under the action of the electric field force, it is in the electric microampere (a) 1a = 1000mA = 1000000 a, and the electricity stipulates that the direction of the directional flow of positive charge is the direction of the current. The microscopic expression of the current in a metal conductor is i=nesv, n is the number of free electrons per unit volume, e is the amount of charge of the electrons, s is the cross-sectional area of the conductor, and y is the charge velocity.

There are many kinds of charge-carrying carriers, for example, electrons that can move in a conductor, ions in an electrolyte, electrons and ions in a plasma, and quarks in hadrons. The movement of these carriers forms an electric current.

The relationship between current and resistance is that when the voltage at both ends of the conductor is constant, the current flowing through the conductor is inversely proportional to the resistance of the conductor. The relationship between current and voltage and resistance is as follows:

i=u r, where i is the current, u is the voltage, and r is the resistance.

1. According to the formula i=u r, it can be said that the current is proportional to the voltage, but it cannot be said that the current is proportional to the resistance, because there is a voltage to have a current, and the resistance only hinders the current, and only when the voltage is constant, the resistance is proportional to the current.

2. According to the deformation formula U=IR, it cannot be said that the voltage is proportional to the current, because the voltage is the cause of the current, there is a voltage to have a current, not a current to have a voltage, the voltage affects the current, so it should be that the current is proportional to the voltage, and it can also not be said that the voltage is proportional to the resistance, only when the current is constant, the voltage is proportional to the current.

3. According to the deformation formula r=u i, it cannot be said that the resistance is proportional to the voltage, and the resistance is inversely proportional to the current, because the resistance is a characteristic of the conductor itself, it does not change with the change of current, and is generally unchanged, and the resistance is only related to the material, cross-sectional area, length, (temperature) and other factors.

4. The fixed value resistance is unchanged in general, it can only be said that according to the deformation formula U=IR, when the resistance is constant, the voltage is proportional to the current, as for the voltage is proportional to the resistance, the resistance is constant, the voltage changes, the current will also change, and the ratio of voltage to current is certain.

1. For pure resistance circuits, the magnitude of the current depends on the voltage U at both ends of the conductor and the resistance r of the conductor.

2. It is meaningless to talk about the relationship between current and resistance alone. It is necessary to point out what is the relationship between current and resistance when the voltage is constant.

3. In a pure resistance circuit, when the voltage is constant, the current is inversely proportional to the resistance.

In the same circuit, the current is inversely proportional to the resistance.

Ohm's law i=u r According to this formula, it is not difficult to find that when the voltage is constant, the greater the resistance, the smaller the current.

Experiment 17 ** Relationship between current and voltage and resistance.

When the voltage is constant, the smaller the current, the greater the resistance.

Is there anything else you don't understand?

Summary. The relationship between current and voltage and resistance is as follows: where i is the current, u is the voltage, and r is the resistance.

The relationship between current and voltage and resistance is as follows: where i is the current, u is the voltage, and r is the resistance.

Relationship disclosure: i=u r

When the voltage at both ends of the conductor is constant, the current flowing through the conductor is inversely proportional to the resistance of the conductor. The formula for the relationship between current, voltage and resistance is: i=u r, where i is the current, u is the voltage, and r is the resistance.

From the above formula, it can be seen that when the voltage is constant, the larger the current, the smaller the resistance, and vice versa, the smaller the current, the greater the resistance.

The relationship between resistance and current is described by Ohm's law. Ohm's law states that there is a linear relationship between the resistance (r) and the current (i) passing through it in a constant state, expressed as: v = i * r where v is the voltage through the resistance.

In simple terms, Ohm's law states that current is proportional to voltage, and resistance is the proportionality constant of this proportional relationship. In other words, when the current through one resistor increases, so does the corresponding voltage. When the resistance increases, the corresponding current decreases.

Ohm's law is true for circuits that conform to linear resistance, i.e., the resistance does not change with voltage and current. In fact, resistance can deteriorate and fibrillate with factors such as temperature changes, nonlinear changes in voltage and current, etc., which need to be described using other forms of resistance models and laws. In general, however, Ohmdine's law still applies.