Series Circuit and Components Quiz

What is the rule for current in a series circuit?

• Current is the same throughout the circuit.

• Current increases with each component.

• Current decreases with each component.

• Current is zero.

What is the rule for potential difference in a series circuit?

• Potential difference is the same across each component.

• Potential difference is zero.

• Potential difference is shared between components.

• Potential difference increases with each component.

What happens to the potential difference across a thermistor as temperature increases?

• It increases.

• It decreases.

• It remains the same.

• It becomes zero.

What happens to the potential difference across a LDR as light intensity increases?

• It increases.

• It decreases.

• It remains the same.

• It becomes zero.

What is the rule for resistance in a series circuit?

• Resistance is the same for each component.

• Total resistance is the sum of individual resistances.

• Resistance is zero.

• Resistance decreases with each component.

Calculate the resistance of the LDR given a potential difference of 30V and a current of 2mA.

• 15kΩ

• 10kΩ

• 5kΩ

• 20kΩ

If the light intensity increases and the LDR now has a resistance of 2000 ohms, calculate the new potential difference across the LDR and the fixed resistor.

• 6V across LDR, 24V across resistor

• 12V across LDR, 18V across resistor

• 24V across LDR, 6V across resistor

• 18V across LDR, 12V across resistor

What formula is used to calculate the potential difference across a fixed resistor in a series circuit?

• V = IR

• V = I/R

• V = R/I

• V = I + R

In a series circuit, how is the current distributed?

• The current is different across each component.

• The current is the same everywhere.

• The current is zero.

• The current doubles at each component.

How can the potential difference across the LDR be found using the total voltage and the voltage across the fixed resistor?

• V₂ = V₁ + Vₜ

• V₂ = Vₜ - V₁

• V₂ = Vₜ + V₁

• V₂ = V₁ - Vₜ