Understanding Ohm's Law and Electrical Components

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

• Resistance is directly proportional to current

• Current is directly proportional to voltage and inversely proportional to resistance

• Voltage is directly proportional to resistance

• Current is inversely proportional to voltage

How can the resistance (R) be calculated if voltage (V) and current (I) are known?

• R = V * I

• R = V / I

• R = V + I

• R = I / V

What is the characteristic of an ohmic conductor regarding its resistance?

• Resistance is zero

• Resistance increases as voltage increases

• Resistance remains constant regardless of voltage

• Resistance decreases as voltage increases

In the experiment with a resistor, what was observed when the voltage was increased?

• The voltage remained constant

• The current decreased

• The resistance increased

• The current increased proportionally

What does the straight line in a current-voltage plot of a resistor indicate?

• Decreasing resistance

• Ohmic behavior

• Increasing resistance

• Non-linear resistance

What unusual behavior does an incandescent light bulb exhibit when tested for resistance?

• Resistance increases as the temperature increases

• Resistance decreases as the temperature increases

• Resistance remains the same at different temperatures

• Resistance is not affected by temperature

Why is an incandescent bulb considered a non-ohmic component?

• It has a constant resistance

• Its resistance changes with applied voltage

• It does not conduct electricity

• It only works at high temperatures

Which component is used to demonstrate non-ohmic behavior due to temperature changes?

• Variable power supply

• Semiconductor diode

• Incandescent light bulb

• Standard resistor

What is a key characteristic of a semiconductor diode in terms of current flow?

• It conducts only in the forward direction after a certain voltage

• It has constant resistance

• It conducts equally in both forward and reverse directions

• It does not conduct in the forward direction

How does the resistance of a semiconductor diode behave?

• Decreases with increasing voltage

• Increases with increasing voltage

• Varies non-linearly with voltage

• Is not affected by voltage