Resistance in Non-Ohmic Conductors

The video tutorial explains the difference between Ohmic and Non-Ohmic conductors, focusing on how they relate to Ohm's Law. It covers the IV characteristics of Ohmic conductors, where resistance remains constant, resulting in a straight line graph. In contrast, Non-Ohmic conductors exhibit a change in resistance with increased voltage, leading to a nonlinear graph. The tutorial also discusses how temperature affects resistivity and resistance, and how to analyze these changes using slope comparisons. Finally, it highlights factors like resistivity, length, and cross-sectional area that influence resistance.

What is the main difference between Ohmic and Non-Ohmic conductors?

• Non-Ohmic conductors have constant resistance.

• Ohmic conductors follow Ohm's Law.

• Non-Ohmic conductors follow Ohm's Law.

• Ohmic conductors have variable resistance.

Which equation represents Ohm's Law?

• V = R/I

• V = IR

• V = I/R

• V = I^2R

What does a straight line in an IV characteristic graph indicate?

• Increasing resistance

• Decreasing resistance

• Constant resistance

• Variable resistance

Why do Non-Ohmic conductors not follow Ohm's Law?

• Because their resistance increases with temperature.

• Because their resistance remains constant.

• Because their resistance decreases with voltage.

• Because their resistance is unaffected by temperature.

What happens to the IV curve of a Non-Ohmic conductor as voltage increases?

• It becomes a straight line.

• It remains unchanged.

• It becomes nonlinear.

• It becomes a horizontal line.

How can you determine if resistance is increasing in a Non-Ohmic conductor?

• By observing an increasing slope.

• By observing a horizontal slope.

• By observing a decreasing slope.

• By observing a constant slope.

What does a greater slope in the IV curve of a Non-Ohmic conductor indicate?

• Decreasing resistance

• No change in resistance

• Constant resistance

• Increasing resistance

What is the relationship between resistivity and resistance?

• Resistivity does not affect resistance.

• Resistivity is directly proportional to resistance.

• Resistivity is equal to resistance.

• Resistivity is inversely proportional to resistance.

Which factor does not affect the resistance of a conductor?

• Length

• Cross-sectional area

• Temperature

• Color

What happens to the resistance when the temperature of a conductor increases?

• Resistance becomes zero

• Resistance decreases

• Resistance remains constant

• Resistance increases