Pretest 8: Electrical Circuit

It is a closed-loop through which current flows.

• circuit

• current

• resistance

• voltage

What type of circuit is appropriate in connecting appliances and light bulbs at home?

• series circuit

• parallel circuit

• either series circuit or parallel circuit

• neither series circuit or parallel circuit

What type of circuit connection is used in Christmas lights?

• series circuit

• parallel circuit

• either series circuit or parallel circuit

• neither series circuit or parallel circuit

What type of circuit connection should a light bulb be connected to maintain maximum brightness?

• series circuit

• parallel circuit

• either series circuit or parallel circuit

• neither series circuit or parallel circuit

What type of circuit connection should a light bulb be connected to maintain the amount of current in the conducting wire?

• series circuit

• parallel circuit

• either series circuit or parallel circuit

• neither series circuit or parallel circuit

Circuits in home are usually connected in _______.

• series circuit

• parallel circuit

• either series circuit or parallel circuit

• neither series circuit or parallel circuit

The following are advantages of bulbs connected in series EXCEPT:

• It does not overheat.

• It is easy to install and maintain.

• Low current is needed to light all the bulbs.

• Large amount of current is needed to light all the bulbs.

The following are disadvantages of connecting too many bulbs in parallel EXCEPT:

• Bulb will easily overheat.

• It is difficult to maintain and install.

• There will be current overloading in the conducting wire.

• There will be equal amount of voltage for every load in a circuit.

If one bulb of Christmas lights, connected in series is burned out, what will happen to the other light bulbs?

• All other bulbs will no longer work.

• All other bulbs will continue to light

• The brightness of the bulbs will increase.

• The brightness of the bulbs will decrease.

Three light bulbs with resistances 2000 Ω, 1600 Ω, and 800 Ω are connected in series respectively. Which one has the highest brightness when the circuit is plugged to a 220 V voltage source?

• 800 Ω

• 1600 Ω

• 2000 Ω

• none of the above