Series vs. Parallel Circuits: Characteristics and Comparison

Which statement best describes how light bulbs are connected in a series circuit?

• They are connected end to end in a single loop.

• Each bulb is connected directly to the power source in its own branch.

• They are connected only by their bases.

• They are not connected to a power source.

In a series circuit with two identical light bulbs, what happens to the voltage across each bulb?

• Each bulb receives the full voltage from the source.

• The voltage is divided between the two bulbs.

• There is no voltage across the bulbs.

• The voltage only goes to the first bulb.

Two identical bulbs are added to the same circuit in series. Compared to a single bulb in series, how will their brightness change?

• They will be brighter because the current increases.

• They will be dimmer because the voltage per bulb decreases.

• The brightness will not change.

• They will go out because the current is divided.

In a parallel circuit with bulbs of equal resistance, how does the current behave?

• All the current passes through one bulb.

• The current is the same everywhere and does not split.

• The current is divided equally among the bulbs.

• No current flows.

A student wants each bulb to remain bright even if more bulbs are added later. What type of connection should the student choose?

• Series, because the voltage is divided among the bulbs.

• Parallel, because each bulb receives the full voltage from the source.

• Open circuit, because it saves energy.

• Series, because the current is divided among the bulbs.

Which material is described as one that allows the flow of electron current and is an example of a conductor?

• Rubber

• Plastic

• Copper

• Foam

What do insulators do in an electric circuit?

• They accelerate the flow of electrons

• They block or absorb electrons and stop the current

• They directly create light energy

• They turn on a switch

According to the text, what happens in a circuit when the switch is closed?

• The circuit is open and the light turns off

• The circuit is complete and the electrons keep flowing

• The electrons stop flowing but the light becomes brighter

• The battery immediately loses all its potential energy

Which statement best describes the energy transformations in a light bulb as explained?

• Thermal energy is converted into electrical energy

• Luminous energy is converted into electrical energy

• Electrical energy is converted into thermal (heat) energy and then into luminous energy

• Potential energy is converted only into sound energy

Which of these is named as a possible insulator?

• Aluminum

• Water

• Human body

• Foam