To keep a desktop computer or a server powered up when the electricity goes off in addition to protection against power fluctuations, an <u>uninterruptible power supply (UPS)</u>, which contains a built-in battery, can be used.
<u>Explanation</u>:
An uninterruptible power supply (UPS) is a device that allows a computer or server powered up for a short time, when the electricity goes off. UPS device also provides uninterrupted service during power fluctuation.
A battery is inbuilt in the UPS and provides power for few minutes to the computer to shut down it in a proper manner.
UPS is available at affordable cost and can be maintained at low cost compared to generators.
Answer: PLC uses:
1. Decimal Number system
2. Binary Number system.
3. Octal Number system.
4. Hexadecimal Number system.
5. Binary Coded Decimal Number system.
6. Negative Number system.
7. Number Conversations.
Explanation: The other numbers the Programmable Logic Controller(PLC) uses aside the decimal number system are:
1. Binary Number system.
2. Octal Number system.
3. Hexadecimal Number system.
4. Binary Coded Decimal Number system.
5. Negative Number system.
6. Number Conversations.
Answer:
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Figure 1: An image — an array or a matrix of pixels arranged in columns and rows.
In a (8-bit) greyscale image each picture element has an assigned intensity that
ranges from 0 to 255. A grey scale image is what people normally call a black and
white image, but the name emphasizes that such an image will also include many
shades of grey.
Figure 2: Each pixel has a value from 0 (black) to 255 (white). The possible range of the pixel
values depend on the colour depth of the image, here 8 bit = 256 tones or greyscales.
A normal greyscale image has 8 bit colour depth = 256 greyscales. A “true colour”
image has 24 bit colour depth = 8 x 8 x 8 bits = 256 x 256 x 256 colours = ~16
million colours.