1. Material used for LED is. A) Gallium and Arsenic B) Gallium Arsenide (GaAs) C) Silicon 2. PCB base material for switching circuits is. A) Gold B) Nickel C) Copper D) Silver 3. Emitter circuit is. A) Reverse biased for high resistance B) Forward biased to allow low resistance C) Neutral 4. Collector circuit…
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