POWER ELECTRONIC COMPONENTS - Practice Mode

1) What will happen in SCR with forward biased condition and gate current is applied?

Reverse current conduction commences Forward current conduction stops Reverse current turned off Forward current conduction commences

Correct Answer: Forward current conduction commences

2) How many layers of PN - junctions are used in SCR fabrication?

Two layer two junctions Four layer three junctions Three layer three junctions Three layer four junctions

Correct Answer: Four layer three junctions

3) Which semiconductor devices are composed inside the solid state relays?

Diodes and transistors Thyristor and transistors MOSFETs and IGBTs UJYs and FETs

Correct Answer: Thyristor and transistors

4) What is the function of solid state relay(SSR)?

Low pass filter High frequency oscillator High gain amlifier High speed switching

Correct Answer: High speed switching

5) How the lamp failures caused by the high inrush currents in lamp dimmer circuits using TRIAC is eliminated?

By the fuse Using MCB Using Safety resistor By soft start circuit

Correct Answer: By soft start circuit

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