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? 0.2 A None of these 0.3 A 0.6 A 0.4 A 0.2 A None of these 0.3 A 0.6 A 0.4 A ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The number of free electrons and holes in intrinsic semiconductor increases when the temperature Decreases Increases Stays the same None of these 0oC Decreases Increases Stays the same None of these 0oC ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The rise time of a pulse waveform is the time required for the voltage to rise: from 10% of the peak value to 90% of the peak value from 10% of the peak value to 70.7% of the peak value from zero to its peak value None of these from zero to its rms value from 10% of the peak value to 90% of the peak value from 10% of the peak value to 70.7% of the peak value from zero to its peak value None of these from zero to its rms value 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? 0.20833333333333 20 A None of these 50 A 0.20833333333333 20 A None of these 50 A ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following statements is true for resistance in a parallel circuit? The total resistance is equal to the sum of the individual resistances in a parallel circuit. The total resistance in a parallel circuit is equal to the average value of the individual resistances The total resistance of a parallel circuit is always less than the value of the smallest resistance The total resistance of a parallel circuit is equal to the total voltage None of these The total resistance is equal to the sum of the individual resistances in a parallel circuit. The total resistance in a parallel circuit is equal to the average value of the individual resistances The total resistance of a parallel circuit is always less than the value of the smallest resistance The total resistance of a parallel circuit is equal to the total voltage None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The emitter diode is usually Operating in the breakdwon region Nonconducting Forward-biased None of these Reverse-biased Operating in the breakdwon region Nonconducting Forward-biased None of these Reverse-biased ANSWER DOWNLOAD EXAMIANS APP
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