Quick Answer: Why Is Area Inversely Proportional To Resistance?

Why current and resistance are inversely proportional?

Current is the flow of electrons from a level of higher potential to a level of lower potential.

Resistors provide an opposition to the flow of electrons , so if more resistance is provided , less amount of electrons will tend to flow.

Therefore Current is inversely proportional to Resistance..

Is resistance directly proportional to power?

Power in electronics is the rate of doing work. Resistance is the opposition offered against the flow of electrons. The relation between power and resistance is proportional.

What causes resistance?

An electric current flows when electrons move through a conductor, such as a metal wire. The moving electrons can collide with the ions in the metal. This makes it more difficult for the current to flow, and causes resistance.

What is the power of resistance?

Power is P=IV. You can only relate it to resistance if you decided to fix one and replace the other by Ohm’s law. Ohm’s law states that voltage across a resistor is linearly proportional to the current flowing through it, or V=IR. This can be arranged to say that current is inversely proportional to voltage, or I=VR.

Is resistance inversely proportional to area?

The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area.

Why resistance is directly proportional to length?

Directly proportional ; as the length of the wire increases , its resistance increases. Why? Simply speaking,the longer the distance the electron has to travel ,the more collisions it will face with the atoms ; which means higher resistance.

Why does resistance decrease with area?

The longer a wire is the more resistance it has due to the longer path the electrons have to flow along to get from one end to the other. The larger the cross sectional area, the lower the resistance since the electrons have a larger area to flow through.

Does diameter affect resistance?

Resistance is inversly proportional to the diameter of the of cross section section of a conductor . Because when diameter will large then the area of cross section will large and electrons can move more freely hence the resistance wiil reduce .

Do conductors have low resistance?

If the voltage is high enough, electric current can be made to flow through even materials that are generally not considered to be good conductors. … Conductors have a very low resistance to electrical current while insulators have a very high resistance to electrical current.

Is resistivity directly proportional to resistance?

Resistivity ρ is an intrinsic property of a material and directly proportional to the total resistance R, an extrinsic quantity that depends on the length and cross-sectional area of a resistor.

Does length of wire affect resistance?

First, the total length of the wires will affect the amount of resistance. The longer the wire, the more resistance that there will be. … In the same manner, the wider the wire, the less resistance that there will be to the flow of electric charge.

When resistance increases what happens to resistivity?

So, resistivity is the specific resistance of a material. When we have a thick wire, the resistance decreases. The resistance increases when the wire is thin as the area of cross-section is less. When the length of the wire increases, the resistance also increases.

What is the relation between temperature and resistance?

As temperature rises, the number of phonons increases and with it the likelihood that the electrons and phonons will collide. Thus when temperature goes up, resistance goes up. For some materials, resistivity is a linear function of temperature. The resistivity of a conductor increases with temperature.

Does temperature affect resistance?

Heating a metal conductor makes it more difficult for electricity to flow through it. These collisions cause resistance and generate heat. … Heating the metal conductor causes atoms to vibrate more, which in turn makes it more difficult for the electrons to flow, increasing resistance.

Is current directly proportional to area?

Resistance is inversely proportional to current. Again resistance is inversely proportional to area of conductor. Therefore ,current is directly proportional to cross sectional area,greater the area more is the current.

Does voltage affect resistance?

Ohm’s law states that the electrical current (I) flowing in an circuit is proportional to the voltage (V) and inversely proportional to the resistance (R). Therefore, if the voltage is increased, the current will increase provided the resistance of the circuit does not change.

What is the relation between power and resistance?

Originally Answered: What is the direct relation between power and resistance? Power is voltage squared over resistance, or P= V^2 / R. Likewise, resistance is voltage squared over power. These are both from the relation P=IV.