What is the relationship between current, resistance, and resistance

Current --- the flow of charge formed in a certain direction in the body under the action of an electric field.

Resistance --- the ability of a conductor to resist the flow of its own charge under certain conditions.

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.

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 current, u is voltage, and r is 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.

Resistance is a property of the conductor itself, so the resistance of the conductor has nothing to do with factors such as whether the conductor is connected to the circuit, whether there is current in the conductor, and the magnitude of the current. Superconductor.

The resistivity of the superconductor is zero, so the resistance of the superconductor is zero.

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. Voltage, also known as potential difference or potential difference, is a physical quantity that measures the difference in energy between a unit charge in an electrostatic field due to different potentials.

What is the voltage, current, and resistance.

Voltage, also known as potential difference or potential difference, is a physical quantity that measures the difference in energy between a unit charge in an electrostatic field due to different potentials.

Electric current, which is the directional movement of an electric charge. The electromotive force of the power supply is formed by the voltage, which in turn generates the electric field force, and under the action of the electric field force, the charge in the electric field moves directionally, forming an electric current.

The resistance of a conductor to an electric current is called the resistance of the conductor.

What is the voltage, current, and resistance.

What is the voltage, current, and resistance. Hello dear, current: We know that water can flow in a tube, and we call it water flow.

In the same way, electrons can flow in the wire, and this flow of electrons is called an electric current. Electric currents are generally symbolized"i"Denote. There is a difference between high and low water in the flow, and there is also a difference in the strength and weakness of electricity in the flow.

The laughter of the electric current is expressed in terms of the intensity of the electric current. The intensity of the current is numerically equal to the amount of electricity that passes through the cross-section of the wire in one second. The magnitude of the current is usually the magnitude of the current intensity.

The unit that generally expresses the intensity of the current is amperes, referred to as amperes, with symbols"a"Denote. In some circuits, the current flowing through is very small and is usually measured in milliamps and microamps. The conversion relationship between them is:

1 amp = 1000 milliampere (ma) 1 mA = 1000 microampere (a) Voltage: As we all know, the reason why water can flow in the pipe is because of the difference between high and low water levels, and the water can flow from high to low. The tap water used in the city can flow out of the pipe as soon as the water gate is opened, because the water storage tower is higher than the ground, or because the pressure difference caused by the water pump.

The same is true of electricity, which is able to flow in the wire, also because there is a difference between high and low potential. This difference is called the potential difference, also known as the voltage. In other words.

In a circuit, the potential difference between any two points is called the voltage at those two points. Voltage with a symbol"u"Denote. The level of voltage is generally expressed in unit volts, referred to as volts, and is symbolized"v"Denote.

High voltages can be expressed in kilovolts (kv) and low voltages can be expressed in millivolts (mv). The conversion relationship between them is: 1 kilovolt (kv) 1000 volts (v) 1 volt (v) 1000 millivolt (mv) resistance:

When water flows in the pipe, it is not unimpeded, but is subject to a certain resistance, blocking the flow of water, which is called water resistance. In the same way, when an electric current is passed through a wire, the movement of electrons in the wire is also subject to a certain resistance, which is called resistance. Resistors with symbols"r"The unit of representation of the magnitude of the resistance is the ohm, referred to as the ohm, with a symbol"Denote.

The conversion relationship between the large resistance values is: 1 kiloohm (k) 1000 ohms ( 1 megaohm ( m ) 1 , 000 , 000 ohms ( I hope it can help you.