Understanding Wireless Communication

What happens when you press 'send' on a messaging app?

• The message is stored in the phone's memory.

• The message is converted into radio waves immediately.

• The message is sent directly to the recipient's phone.

• Instructions are sent to the mobile processor via copper wires.

What is the primary function of an antenna in communication?

• To store messages temporarily.

• To decode messages from the cell tower.

• To amplify sound signals.

• To convert electrical impulses into radio waves.

How are electromagnetic waves similar to gravitational waves?

• Both travel at the speed of sound.

• Both are fluctuations in their respective fields.

• Both are visible to the human eye.

• Both were discovered by Einstein.

What role does the cell tower play in message transmission?

• It stores messages for later retrieval.

• It converts messages into sound waves.

• It receives and decodes electromagnetic waves.

• It directly sends messages to the recipient's phone.

How does a phone know where the cell tower is located?

• The phone has a built-in GPS for cell towers.

• The phone broadcasts messages in all directions.

• The phone receives a signal from the nearest tower.

• The phone uses a map of cell tower locations.

What ensures that only the intended cell tower can decode a message?

• The message is sent with a unique sound.

• The message is encrypted.

• The message is sent in a unique language.

• The message is sent at a specific time.

How do cell towers differentiate between messages from different phones?

• By using different languages.

• By using different protocols like time, frequency, or codes.

• By using different sound frequencies.

• By using different encryption methods.

What analogy is used to explain the protocol between phones and cell towers?

• A concert with multiple performers.

• A market with various stalls.

• A classroom with students and a teacher.

• A library with many books.

Why are cables still used in modern communication?

• They are more fashionable than wireless systems.

• They are easier to install than wireless systems.

• They can carry more data with less interference.

• They are cheaper than wireless communication.

What is a major drawback of using satellites for all communication?

• Satellites are too slow for modern data needs.

• Satellites cannot cover all areas of the Earth.

• Satellites cannot handle encrypted messages.

• Launching satellites is very expensive.