Understanding Negative Resistance

The video explores the concept of negative resistance, contrasting it with positive resistance using Ohm's law. It explains how negative resistance results in an inverse relationship between voltage and current. The video demonstrates this phenomenon using an NPN transistor, detailing an experiment to observe negative resistance. It concludes with practical applications and further experiments to validate the findings.

What does Ohm's Law state about the relationship between voltage, current, and resistance?

• Voltage is the sum of current and resistance.

• Voltage is the product of current and resistance.

• Voltage is the difference between current and resistance.

• Voltage is the quotient of current and resistance.

In a positive resistance region, what happens to the current when the voltage increases?

• The current decreases.

• The current remains constant.

• The current increases.

• The current fluctuates randomly.

What is the behavior of current in a negative resistance region when the voltage increases?

• The current remains constant.

• The current decreases.

• The current increases.

• The current fluctuates randomly.

Which device is commonly known to exhibit negative resistance?

• Resistor

• Capacitor

• NPN Transistor

• Inductor

How is an NPN transistor configured to exhibit negative resistance?

• By connecting the base to the collector.

• By using a higher resistance in the base circuit.

• By reversing the connections of the collector and the emitter.

• By connecting the emitter to a positive voltage source.

At what voltage did the 2N2222A transistor begin to conduct in the reverse direction during the experiment?

• 5.1 volts

• 6.9 volts

• 7.3 volts

• 8.1 volts

What was the maximum current measured during the experiment with the 2N2222A transistor?

• 3.04 milliamps

• 5.00 milliamps

• 0.1 milliamps

• 1.86 milliamps

What was the purpose of the additional experiment conducted with the transistor?

• To test the transistor's performance at high temperatures.

• To determine the lifespan of the transistor.

• To measure the voltage across the base and collector.

• To confirm that negative resistance is not due to the voltage divider network.

What was the breakdown voltage range for the transistor in the additional experiment?

• Between 8.0 and 9.0 volts

• Between 7.4 and 7.6 volts

• Between 6.5 and 7.0 volts

• Between 5.0 and 6.0 volts

What is a practical application of negative resistance mentioned in the video?

• Signal filter

• Voltage regulator

• Esaki oscillator

• Current amplifier