Upwork Electronics

/Upwork Electronics

Semiconductor Electronics Test

1. An SCR is a solid state equivalent of a _____. Answers: triode pentode thyratron diode 2. If the input to an integrating circuit is a square wave, the output will be _____. Answers: triangular rectangular saw-tooth spiked 3. A P-type material is _____. Answers: positively charged negatively charged electrically neutral none of the above [...]

By | October 6th, 2015|Upwork Electronics|0 Comments

Fiber Optics Test

1. For a step index fiber, relationship between numerical aperture (NA) and coupling efficiency (ηc) is ________. Answers: a b c d 2. Mirrors are placed in LASER optical sources to maintain conditions for ________. Answers: incoherence amplification modulation coherence 3. Optical bandwidth (OB) relates to electrical bandwidth (EB) when Answers: OB<EB OB=EB OB>EB OB≥EB [...]

By | October 5th, 2015|Upwork Electronics|0 Comments

Electronic Design Test

1. A Colpitt’s oscillator uses _____. Answers: a tapped inductor a tapped capacitor no tapped inductor or capacitor both a tapped inductor and a tapped capacitor 2. A Wien-bridge oscillator is basically a _____. Answers: pulse generator sine-wave generator square-wave generator triangular wave generator 3. A voltage V=300cos100t is applied to a half wave rectifier [...]

By | October 5th, 2015|Upwork Electronics|0 Comments