Answer :
Explanation:
When a number key or letter key is pressed, an electrical signal is generated. So, the correct answer would be (iv) All of these.
Answer:
All of these
Explanation:
It is because the computer keyboard work on the usage of electrical signals. Each key is associated with a different signal, recognised by the computer.
I.e., when 'A' key is pressed, the keyboard sends a signal to the computer encoded somehow so that the computer knows only 'A' key is pressed.
In essence, each keypress generates an electrical signal.