SCR Quiz

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Questions and Answers

Match the following components with their corresponding connections in an SCR:

Anode = P-type semiconductor Cathode = N-type semiconductor Gate = P-type semiconductor Junction J1 = Anode connection

Match the following terms with their corresponding description in relation to SCRs:

NPNP = Structure formed by four layers of semiconductors PNPN = Structure formed by four layers of semiconductors Anode = Connects to the P-type semiconductor Cathode = Connects to the N-type semiconductor

Match the following applications with their usage of SCRs:

Motor control function = Medium and high AC power operations High voltage control = Electronic devices Power regulation = Control of high voltage and power Low voltage operations = General-purpose electronic devices

Match the following symbols with their corresponding component in an SCR:

<p>SCR symbol = Representation of the SCR Junction J2 = Part of the SCR structure Gate symbol = Representation of the gate terminal Cathode symbol = Representation of the cathode terminal</p> Signup and view all the answers

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Study Notes

Silicon Controlled Rectifier (SCR)

A 4-layered, 3-terminal device used in electronic devices requiring control of high voltage and power.
Mainly used in medium and high AC power operations, such as motor control functions.

Construction

Consists of four layers of semiconductors forming two structures: NPNP or PNPN.
Has three junctions: J1, J2, and J3, and three terminals: anode, cathode, and gate.
Anode connects to the P-type, cathode to the N-type, and gate to the P-type (in case of PNPN).

Operation and Characteristics

Conducts when a gate pulse is applied, similar to a diode.
Modes of Operation:
- OFF state (Forward blocking mode): • Anode is positive, cathode is negative.
- (No information provided for other modes of operation)