input devices

Question 1

input device

Answer 1

a piece of hardware that introduces data to a system

OR

a hardware components used to transmit data to a system for processing

Question 2

2d scanner

Answer 2

an input device that makes digital copies of documents or pictures.
can scan qr code by using a sensor to detect white gaps , the white gaps reflect light back

Question 3

3d scanner

Answer 3

a device that is used to make digital three dimensional models of an object

Question 4

barcode reader

Answer 4

a (red) light is shined to detect black lines. the light lines reflect light back which is detected by sensors. the reflections are then converted to binary values which are interpreted by microprocessors .

Question 5

chip and pin reader

Answer 5

a card is inserted into a chip and pin reader where the device can access the card’s chip. once the card has been approved, the person is required to type in a pin. once the pin has been approved, the person is able to withdraw money.

Question 6

magnetic stripe reader

Answer 6

a card is ‘swiped’ through a magnetic stripe reader which reads data and feeds it back to the computer

Question 7

resistive touch screen

Answer 7

operates when pressure is applied to the screen

Question 8

capacitive touch screen

Answer 8

operates when it senses direct touch from a human finger or specialised input device.

Question 9

digital camera

Answer 9

a digital camera uses film to capture images. light passes through a lens onto a light sensitive cell and converted from analogue to digital form via an ADC. the image is then stored on a memory card