Basic Circuits and Electrical Concepts Quiz

What happens to the brightness of two identical light bulbs when connected in series?

• Both bulbs become dimmer.

• One bulb becomes brighter, the other dimmer.

• The brightness remains the same.

• Both bulbs become brighter.

What is the term used to describe the ideal voltage supplied by a battery?

• Electromotive force (emf)

• Terminal voltage

• Current

• Internal resistance

How does internal resistance in a battery affect its terminal voltage?

• It has no effect on the terminal voltage.

• It decreases the terminal voltage.

• It doubles the terminal voltage.

• It increases the terminal voltage.

In a series circuit, how does the current through each resistor compare?

• The current is zero for all resistors.

• The current is half for each resistor.

• The current is the same for all resistors.

• The current is different for each resistor.

What principle states that the total current flowing into a junction equals the total current flowing out?

• Ohm's law

• Conservation of charge

• Kirchhoff's voltage law

• Conservation of energy

In a parallel circuit, how does the voltage across each resistor compare?

• The voltage is half for each resistor.

• The voltage is zero for all resistors.

• The voltage is the same for all resistors.

• The voltage is different for each resistor.

What happens to the overall resistance when resistors are added in parallel?

• The overall resistance doubles.

• The overall resistance decreases.

• The overall resistance increases.

• The overall resistance remains the same.

Why do light bulbs in a parallel circuit have the same brightness as a single-bulb circuit?

• Because the current is divided equally.

• Because the overall resistance is halved, increasing the current.

• Because the voltage is divided equally.

• Because the overall resistance is doubled, decreasing the current.