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Universal motors or AC series motors are used for portable applications such as vacuum cleaner, hair drier, portable drilling machines etc as it can work with both AC and DC supply.

Universal motors are essentially DC series motor in construction with laminated armature and stator core to reduce eddy current losses and fewer field turns to reduce the inductance of the coil.

Solder alloys are metallic materials that are used to connect metal workpieces.
This is achieved by melting the alloy and then cooling it down.
The choice of specific alloy depends on its melting point, chemical reactivity, mechanical properties, toxicity, and other properties

The fast pulley is mounted on the shaft with a keyed joint, whereas the loose pulley runs freely on the shaft.

The shunt resistance of ammeter is a low resistance so that the meter does not cause a variation in the magnitude of circuit current.

In other words, ammeter shunt is a low resistance to prevent loading effect.

Aluminum electrolytic capacitors with non-solid electrolyte are cheap and the most widely used electrolytic capacitors. These components can be found on almost all boards of electronic equipment.

The working voltage for non solid type electrolyte is in the range 3-125V

UCS is known as Universal coordinate system

Polar coordinate system is mostly used in AUTOCAD for drawing Angular line

Pan command is used to move the drawing over the computer screen in CAD drawing in any directions.

Roll the wheel backward ‘Zoom out’ during CAD drawing .

If you erase a geometry accidently , OOPS command used to retrieve the geometry in AUTOCAD

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