Electronic Principles What is the smallest number of polarities required for current flow? Three - negative, positive and neutral terminals Four - two negative and two positive Two - a negative terminal and a positive terminal One - a negative terminal None of these Three - negative, positive and neutral terminals Four - two negative and two positive Two - a negative terminal and a positive terminal One - a negative terminal None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The transistor has a collector current of 2 mA. If the current gain is 135, what is the base current? 10.3 µA 7.8 µA 14.8 µA None of these 7.75 µA 10.3 µA 7.8 µA 14.8 µA None of these 7.75 µA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles How much power is being dissipated by a 1000 W resistance that has 25 V applied to it? 80 W 0.625 W None of these 325 kW 0.24 W 80 W 0.625 W None of these 325 kW 0.24 W ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Assuming 100% efficiency, what is the power being consumed at the secondary winding of the transformer described in question 91? None of these 20 W 100 W 1000 W 200 W None of these 20 W 100 W 1000 W 200 W ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Suppose a step-down transformer has a turns ration of 5:1. If the secondary current is 1A rms, what is the primary-current? 0.4 A 0.6 A 0.3 A None of these 0.2 A 0.4 A 0.6 A 0.3 A None of these 0.2 A ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The rotating coil of wire in an electric motor is called the: loop commutator brush None of these armature loop commutator brush None of these armature ANSWER DOWNLOAD EXAMIANS APP
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