Electronic Principles An intrinsic semiconductor has some holes in it at room temperature. What causes these holes? Thermal energy Valence electrons Doping Free electrons None of these Thermal energy Valence electrons Doping Free electrons None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Determine the resistance value and tolerance of a resistor that has the following color bands; first band is red, second band is red, third band is orange, and the fourth band is gold 22,000 Ohm, 5% None of these 220 Ohm, 5% 22, 000 Ohm, 10% 220 Ohm, 10% 22,000 Ohm, 5% None of these 220 Ohm, 5% 22, 000 Ohm, 10% 220 Ohm, 10% ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles How may valence electrons does a silicon atom have? 2 1 None of these 4 2 1 None of these 4 ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following statements applies to common auto batteries? Auto batteries are primary wet-cell batteries Auto batteries are secondary dry-cell batteries Auto batteries are secondary wet-cell batteries None of these Auto batteries are primary dry-cell batteries Auto batteries are primary wet-cell batteries Auto batteries are secondary dry-cell batteries Auto batteries are secondary wet-cell batteries None of these Auto batteries are primary dry-cell batteries ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A transformer has a primary voltage of 120 V rms and a secondary voltage of 25 V rms. If the secondary current is 1A rms, what is the primary current? 208 mA 200 mA 7.8 mA None of these 300 mA 208 mA 200 mA 7.8 mA None of these 300 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles At room temperature an intrinsic silicon crystal acts approximately like a battery a conductor a piece of copper wire an insulator None of these a battery a conductor a piece of copper wire an insulator None of these ANSWER DOWNLOAD EXAMIANS APP
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