How GPS Works on Your Smartphone

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What is the primary technology that enables devices to determine their location?

WLAN (Wireless Local Area Network)

Bluetooth

GPS (Global Positioning System) (correct)

Cellular Network

How often do GPS satellites orbit the Earth?

Every 48 hours

Every 6 hours

Every 24 hours

Every 12 hours (correct)

What is the main function of the Control segment in GPS?

To send signals to GPS satellites

To manage and ensure proper functionality of satellites (correct)

To provide location information to devices

To receive signals from GPS satellites

What type of information do GPS satellites continuously broadcast?

Location and time information (D) Signup and view all the answers

What is the typical number of operational GPS satellites in orbit?

More than 24 (B) Signup and view all the answers

What is the purpose of GPS in everyday life?

To determine one's location (B) Signup and view all the answers

What is the name of the component that manages GPS satellites?

Control segment (A) Signup and view all the answers

What type of signals do GPS satellites broadcast?

Radio signals (B) Signup and view all the answers

What is essential for accurate GPS positioning?

Accurate time information (D) Signup and view all the answers

Which segment of GPS includes the satellites?

Space segment (C) Signup and view all the answers

What happens to the electric charge when your finger touches the screen?

Some of the small electrical charge flows onto your finger (C) Signup and view all the answers

Why do capacitive touchscreens not work when you have gloves on?

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

What does the device do to the raw data from your touch?

Filters and removes background noise (C) Signup and view all the answers

How does the device measure the touch area?

By measuring the capacitance over different pixels (D) Signup and view all the answers

What is a benefit of capacitive touch screen technology?

High touch sensitivity and accuracy (B) Signup and view all the answers

What is an advantage of capacitive touchscreens?

They support multi-touch interactions (B) Signup and view all the answers

What happens to the touch data after filtration?

It is used to determine the exact center of the touch (A) Signup and view all the answers

How does the device track movement on the screen?

It detects movement along the surface (D) Signup and view all the answers

Why are special gloves needed for using touchscreens with gloves?

To have electrically conducting fingertips (A) Signup and view all the answers

What happens to a capacitive touchscreen if it is cracked or pierced?

It usually continues to function (C) Signup and view all the answers

What is the primary function of a GPS receiver?

To calculate the location of the receiver by measuring signal arrival time (A) Signup and view all the answers

What is the minimum number of satellites required for a GPS receiver to determine its location?

3 (D) Signup and view all the answers

Why is a fourth GPS satellite often used in addition to the minimum three required?

To improve the accuracy of the location calculation (B) Signup and view all the answers

What is the principle behind the calculation of distance from a GPS satellite?

distance = speed of light * time (B) Signup and view all the answers

What is the purpose of the conducting layer on a capacitive touchscreen?

To allow the screen to detect changes in electric current (A) Signup and view all the answers

What material is commonly used as the conducting layer on a capacitive touchscreen?

Indium tin oxide (ITO) (D) Signup and view all the answers

What happens when a GPS receiver receives a signal from a second satellite?

The receiver can determine its location within a circle (D) Signup and view all the answers

What is the effect of adding a third GPS satellite to the calculation?

The receiver's location is pinpointed at a single point (C) Signup and view all the answers

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

It detects changes in electric current on the screen (C) Signup and view all the answers

What is the purpose of a GPS receiver's antenna?

To receive signals from GPS satellites (C) Signup and view all the answers