Podcast
Questions and Answers
Resistance is the flow of charge through a material encountering an opposing force similar to mechanical friction.
Resistance is the flow of charge through a material encountering an opposing force similar to mechanical friction.
True (A)
Resistance is directly proportional to the cross-sectional area of the material.
Resistance is directly proportional to the cross-sectional area of the material.
False (B)
As the temperature of most conductor and resistive elements increases, the resistance level decreases.
As the temperature of most conductor and resistive elements increases, the resistance level decreases.
False (B)
Resistance is determined by the material's resistivity, length, cross-sectional area, and pressure.
Resistance is determined by the material's resistivity, length, cross-sectional area, and pressure.
Resistance is thus directly proportional to length and inversely proportional to ______
Resistance is thus directly proportional to length and inversely proportional to ______
The unit of measurement of resistance is the ampere (A).
The unit of measurement of resistance is the ampere (A).
The unit of measurement of resistance is the ______ (Ω)
The unit of measurement of resistance is the ______ (Ω)
Where ρ (Greek letter rho ) is a characteristic of the material called the ______
Where ρ (Greek letter rho ) is a characteristic of the material called the ______
At a fixed temperature of 20C (room temp.), the resistance is related to the other three factors by R = ρ -------- (ohms, Ω) ______
At a fixed temperature of 20C (room temp.), the resistance is related to the other three factors by R = ρ -------- (ohms, Ω) ______
As the temperature of most conductor and resistive elements increases, the ______ level increases
As the temperature of most conductor and resistive elements increases, the ______ level increases
Resistance is thus directly proportional to length and inversely proportional to ______
Resistance is thus directly proportional to length and inversely proportional to ______
The unit of measurement of resistance is the ______ (Ω)
The unit of measurement of resistance is the ______ (Ω)
Where ρ (Greek letter rho ) is a characteristic of the material called the ______
Where ρ (Greek letter rho ) is a characteristic of the material called the ______
Insulators may break down if subjected to excessive ______
Insulators may break down if subjected to excessive ______
Similarly, conductors may be destroyed if too much ______ is passed through them
Similarly, conductors may be destroyed if too much ______ is passed through them
The resistance of any conductor can be calculated from a knowledge of it’s cross-sectional area, it’s length, and the ______ of the material
The resistance of any conductor can be calculated from a knowledge of it’s cross-sectional area, it’s length, and the ______ of the material
A device constructed to have a certain value of resistance is known as a ______
A device constructed to have a certain value of resistance is known as a ______
The power rating of a resistor is important because it limits the maximum voltage that should be applied and the maximum ______ that should flow through the component
The power rating of a resistor is important because it limits the maximum voltage that should be applied and the maximum ______ that should flow through the component
