Explanation

There are three different classes of a computer network namely:

Local Area Network (LAN) covers a small geographical area such as a room, a building or a compound;

Metropolitan Area Network (MAN) has citywide coverage

and Wide Area Network (WAN) that covers the whole globe or beyond the globe.

ND27122022

ND16-1-2023

Explanation

• The SI unit of energy is the Joule (J).
• It is the unit of energy, work, and heat.

Explanation

Explanation

A kilowatt-hour (unit symbol: kW⋅h or kW h; commonly written as kWh) is a non-SI unit of energy

equal to 3.6 megajoules (MJ) in SI units

.Kilowatt-hours are a common billing unit for electrical energy supplied by electric utilities.

Explanation

Explanation

Derived from: computare

Means: “to calculate”, “to count”, “to sum up” or “to think together”. 

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Explanation

"The petrol boat picked up signals of a ship in distress."

• "Distress" is a noun that refers to a state of danger or emergency.

• "Distressed" is an adjective, but it doesn’t fit the grammatical structure of the sentence.

• "Distressing" is a present participle/adjective that refers to something causing distress, but here we need the noun "distress".

Explanation

A device that is used to convert AC voltage into DC voltage is called A Rectifier.

Inverters and rectifiers are electronic circuits that can change the type of electric current.

a rectifier converts AC to DC.

Explanation

Explanation

Felicity: خوشی یا راحت

Happiness: خوشی