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RadPhysics > Transformer > Flashcards

Transformer Flashcards

1
Q

Uses induction coils in their lighting system

A

Ganz Company

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2
Q

Own design of transformer

A

Charles Francis Brush 1881

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3
Q

Secondary generator

A

Lucien Gaulard and John Dixon Gibbs

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4
Q

Use of closed cores

A

Otto Blathy

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5
Q

Use of shunt connections

A

Karoly Zipermowsky

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6
Q

Performed the experiments

A

Miksa Deri

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7
Q

Siemens generator and Gaulard and Gibbs transformer

A

George Westinghouse

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8
Q

Make transformer more practical

A

William Stanley

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9
Q

High voltage

A

Skinny wire

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10
Q

Low voltage

A

Wide wire

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11
Q

Change low voltage to higher v in AC circuit

A

Transformer

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12
Q

Parts of transformer

A

Primary coil
Secondary coil
Iron core

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13
Q

Provides path for the magnetic lines of flux

A

Core

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14
Q

Made of laminated layers of iron

A

Ferromagnetic core

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15
Q

Helps reduce energy losses

A

Ferromagnetic core

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16
Q

Receives energy from the AC source

17
Q

Receives energy from the primary winding and delivers it to the load

A

Secondary winding

18
Q

Protection from dirt

19
Q

Primary winding effects the other coil

A

Inductance

20
Q

Property of a circuit by which energy is stored in the form of an electromagnetic field

A

Inductance

21
Q

What is needed to change the voltage

A

Change the current in the primary

22
Q

Affects the induced voltage on the secondary coil

A

Current level

23
Q

Changing magnetic field means

A

Changing electromagnetic force

24
Q

By changing the current, ….

A

The desired voltage can be obtained

25
Q

Symbol of magnetic flux

26
Q

Amount of magnetic field passing through a given surface

A

magnetic flux

27
Q

Square core of ferromagnetic material

A

Closed-core transformer

28
Q

Transformer with only one winding

A

Autotransformer

29
Q

Refers to single coil acting on it

A

Auto prefix

30
Q

Single winding acts as

A

Both primary and secondary

31
Q

Used when small step up or step down is required

A

Autotransfomer

32
Q

Made with two closed core, more efficient

A

Shell type transformer

33
Q

Does not have ferromagnetic core to link primary and secondary

A

Air-core transformer

34
Q

Primary and secondary are wound on one cylindrical core

A

Open-core transformer

35
Q

Directly proportional to the turns ratio

A

Change in voltage

36
Q

Turns ratio is greater than 1

A

Step up transformer

37
Q

Number of turns in secondary is larger than the primary

38
Q

Turns ratio is less than 1

39
Q

Discover the property of induction

A

Joseph Henry and Michael Faraday (1880s)

RadPhysics (6 decks)

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