Ohmic and Non-Ohmic Conductors

The video tutorial explains Ohm's Law, highlighting the difference between ohmic and non-ohmic conductors. Ohmic conductors, like resistors, maintain a constant resistance and have a linear current-voltage relationship. Non-ohmic conductors, such as incandescent bulbs and semiconductor diodes, exhibit a non-linear relationship due to changing resistance with voltage. The video includes practical examples and tests to illustrate these concepts.

What are the two types of conductors discussed in the video?

• Metallic and Non-metallic

• Conductive and Non-conductive

• Resistive and Non-resistive

• Ohmic and Non-ohmic

According to Ohm's Law, what happens to the current if the potential difference is doubled in a linear circuit?

• The current doubles

• The current is halved

• The current remains the same

• The current quadruples

What is the standard equation for Ohm's Law?

• V = I / R

• V = R / I

• V = I + R

• V = I * R

What characterizes an ohmic conductor?

• It does not conduct electricity

• Its resistance remains constant regardless of the potential difference

• It has a non-linear relationship between current and voltage

• Its resistance changes with voltage

In the experiment with a resistor, what kind of plot is expected for an ohmic conductor?

• A horizontal line

• A curved line

• A straight line

• A zigzag line

What is the resistance of the incandescent light bulb when measured with a known meter?

• 10 ohms

• 4 ohms

• 0.3 ohms

• 3 ohms

Why is an incandescent light bulb considered non-ohmic?

• It has a linear relationship between current and voltage

• Its resistance remains constant

• It does not conduct electricity

• Its resistance changes with the applied potential difference

What happens to the resistance of an incandescent light bulb as the current increases?

• The resistance decreases

• The resistance remains the same

• The resistance fluctuates

• The resistance increases

What is a characteristic of a semiconductor diode in the forward direction?

• It does not conduct at all

• It has a constant resistance

• It conducts in both directions equally

• It conducts after an initial turn-on voltage is exceeded

What is the relationship between current and voltage in a semiconductor diode in the reverse direction?

• It has a constant resistance

• It does not conduct at all

• It has a linear relationship

• It conducts after an initial turn-on voltage is exceeded