Quiz sobre Auriculares y Circuitos

How are headphones similar to speakers?

• They both have a screen.

• They both use magnets and coils.

• They both need batteries.

• They both have a keyboard.

What is the role of electricity in headphones?

• It powers the lights.

• It makes the coil act like a magnet.

• It charges the battery.

• It cools the device.

What is a circuit?

• A type of headphone.

• A path that electricity can follow without stopping.

• A type of magnet.

• A kind of speaker.

Why do louder sounds need more electric current?

• They use less electricity.

• They require more energy.

• They are quieter.

• They use fewer batteries.

What changes about the electricity going to a speaker to make a louder sound?

• The electricity is reduced.

• The electricity is turned off.

• More electricity is sent to the speaker.

• The electricity is made weaker.

How does changing the battery connections affect the electromagnet's poles?

• It makes the electromagnet's poles disappear.

• It changes the direction of the electromagnet's poles.

• It increases the strength of the electromagnet.

• It has no effect on the electromagnet's poles.

What happens to the coil when the electromagnet's poles change direction?

• The coil stops moving.

• The coil moves in different directions.

• The coil becomes larger.

• The coil changes color.

What does the two-color LED indicate about the electric current?

• The LED shows the temperature of the current.

• The LED indicates the speed of the current.

• The LED shows the direction of the electric current.

• The LED changes color randomly.

Why did the light look orange when the sound was made higher?

• The light was broken.

• The light was changing from green to red too fast to see.

• The light was not connected properly.

• The light was reflecting off a surface.

What controls the pitch of a sound?

• The size of the speaker

• The color of the speaker

• How often the electric current changes direction

• The material of the speaker