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? 200 mA None of these 208 mA 7.8 mA 300 mA 200 mA None of these 208 mA 7.8 mA 300 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The emitter diode is usually Reverse-biased Forward-biased Nonconducting None of these Operating in the breakdwon region Reverse-biased Forward-biased Nonconducting None of these Operating in the breakdwon region ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is a negative ion? An atom that contains more electrons than neutrons An atom that contains more protons than electrons An atom that contains more protons than neutrons An atom that contains more electrons than protons None of these An atom that contains more electrons than neutrons An atom that contains more protons than electrons An atom that contains more protons than neutrons An atom that contains more electrons than protons None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A power transformer steps 100 V down to 10 V. If the current in its primary winding is 2 A, what is the current in the secondary winding? None of these 50 A 20 A 0.20833333333333 None of these 50 A 20 A 0.20833333333333 ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Doubling the operating frequency of a capacitive circuit: doubles the amount of a capacitive reactance has no effect on the capacitive reactance multiplies the capacitive reactance by 6.28 None of these cuts the capacitive reactance in half doubles the amount of a capacitive reactance has no effect on the capacitive reactance multiplies the capacitive reactance by 6.28 None of these cuts the capacitive reactance in half ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles At room temperature an intrinsic silicon crystal acts approximately like an insulator a conductor None of these a battery a piece of copper wire an insulator a conductor None of these a battery a piece of copper wire ANSWER DOWNLOAD EXAMIANS APP
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