Circuit DOL 2

Which of the circuits below produces light when the switch is closed?

• A

• B

• C

• D

A student built the following circuit using four bulbs, three switches, and a battery strong enough to provide electricity to the entire circuit. He notices that only some of the light bulbs are on. Which of the light bulbs in the circuit are on? Choose TWO correct answers.

• bulbs 1 and 3

• bulb 2

• bulbs 3 and 2

• bulb 4

• bulbs 1 and 2

A string of lights with small bulbs is shown below. The bulbs are connected by a wire that is covered with an insulator. When the lights are on, electricity travels in —

• an incomplete path

• a sound wave

• a complete path

• a light wave

A group of students is building the circuit represented in the diagram. Which object can be used at Position X for the buzzer to sound when switch K is closed?

• a power source

• an insulated wire

• another bulb

• another switch

People use different devices in their homes that need electrical energy. Look at the images below.

Explain what energy is produced when an electric current passes through the circuit of the iron and clothes dryer.