I think it is. Only if you consider pi to affect thatDr. Courtney said:Is the surface area really proportional to r^2?
Can you tell me the difference. in my book it says Resistance is in disproportional to the cross section of the resistance.Dr. Courtney said:Are you confusing surface area and cross sectional area?
Surface area means area of the entire surface of the conductor. Cross sectional area is the area "through" which the current flows. Resistance is inversely proportional to the cross sectional area of the conductor.prishila said:Can you tell me the difference. in my book it says Resistance is in disproportional to the cross section of the resistance.
I understand. But how can this affect the solution of my exercise?cnh1995 said:Surface area means area of the entire surface of the conductor. Cross sectional area is the area "through" which the current flows. Resistance is inversely proportional to the cross sectional area of the conductor.
If "dimidiated" means halved, I agree that the answer is D.prishila said:I understand. But how can this affect the solution of my exercise?
Resistance is the measure of how difficult it is for electricity to flow through a material. In other words, it is the opposition to the flow of electric current.
Resistance is measured in ohms (Ω) using a device called a multimeter. To measure the resistance of a wire, the wire is connected to the multimeter and the resistance reading is displayed on the screen.
The resistance of a wire is affected by three main factors: the length, cross-sectional area, and material of the wire. Longer wires have higher resistance, while thicker wires have lower resistance. Different materials also have different resistances.
In most materials, an increase in temperature leads to an increase in resistance. This is because as the temperature rises, the atoms in the material vibrate more, making it harder for electrons to pass through the material.
Knowing the resistance of a wire is important in many practical applications, such as designing circuits and determining the safety of electrical systems. It also helps in understanding the behavior of electricity and how it flows through different materials.