How GPS Works: Understanding Global Positioning System

Why do capacitive touchscreens respond to a fingertip?

Because fingers have a small electric charge
Because fingers are conductive and allow the flow of electric charge (correct)
Because fingers reflect light onto the screen
Because fingers apply pressure to the screen

What happens when your finger touches the screen of a capacitive touchscreen device?

The device turns off
The device sends an electric shock to your finger
The screen becomes non-conductive
Some of the small electrical charge flows onto your finger (correct)

How does a capacitive touchscreen device measure the touch area?

By measuring the sound waves from the touch
By measuring the light reflected from the screen
By measuring the field distortion caused by the touch (correct)
By measuring the pressure applied on the screen

What is the purpose of filtering and removing background noise in capacitive touchscreens?

To remove unwanted signals from the touch data (D) Signup and view all the answers

What is the benefit of capacitive touchscreens that allows them to support multiple touch points at once?

Support for multi-touch and multitouch interactions (A) Signup and view all the answers

Why do special gloves with electrically conducting fingertips need to be used with capacitive touchscreens?

Because they allow the flow of electric charge from the finger (B) Signup and view all the answers

What is the advantage of capacitive touchscreens in terms of reliability?

They continue to function even when cracked or pierced (B) Signup and view all the answers

What does a capacitive touchscreen device detect to determine how to change the display?

The movement and duration of the touch (D) Signup and view all the answers

What is the reason why capacitive touchscreens do not work when wearing gloves?

The material of the gloves is an insulator (B) Signup and view all the answers

What is the advantage of capacitive touchscreens in terms of input method?

They can be used without a stylus (C) Signup and view all the answers

What is the main function of GPS in electronic devices?

To determine the exact location on Earth (D) Signup and view all the answers

How many operational GPS satellites are typically in orbit?

24 (B) Signup and view all the answers

What is the role of the control segment in GPS?

To manage and ensure the proper functionality of the satellites (C) Signup and view all the answers

How often do GPS satellites make a full orbit of Earth?

Every 12 hours (B) Signup and view all the answers

What information do GPS satellites continuously broadcast?

Radio signals that include information about their location and the precise time (C) Signup and view all the answers

What is essential for accurate GPS positioning?

The timing information from the satellites (C) Signup and view all the answers

What is the name of the system that allows us to determine our exact location on Earth?

Global Positioning System (B) Signup and view all the answers

What is the purpose of the space segment in GPS?

To broadcast radio signals (C) Signup and view all the answers

What is the benefit of GPS in everyday life?

It provides a means of navigation (A) Signup and view all the answers

What is the relationship between the control segment and the satellites?

The control segment manages the functionality of the satellites (A) Signup and view all the answers

What is the main function of a GPS receiver?

To listen to the signals broadcast by GPS satellites (B) Signup and view all the answers

What is required to calculate the distance from a GPS satellite to a GPS receiver?

The speed of light and time (B) Signup and view all the answers

Why does a GPS receiver need at least three satellites to determine its location?

To determine the exact location using trilateration (A) Signup and view all the answers

What is the purpose of a fourth GPS satellite?

To validate the information from the other three satellites (D) Signup and view all the answers

What type of material is used to coat the surface of a capacitive touchscreen?

A thin layer of indium tin oxide (ITO) (C) Signup and view all the answers

What is the function of the electric current on a capacitive touchscreen?

To detect the touch of a finger or stylus (D) Signup and view all the answers

What is the main advantage of capacitive touchscreens over other types of touchscreens?

They are more advanced and have more capabilities (C) Signup and view all the answers

What is the common application of capacitive touchscreens?

In consumer products like smartphones and tablets (A) Signup and view all the answers

What is the principle behind the working of a capacitive touchscreen?

It uses electricity to detect touch (B) Signup and view all the answers

What is the purpose of the glass surface on a capacitive touchscreen?

To protect the conducting layer from damage (C) Signup and view all the answers