What is the barrier potential of a silicon diode at room temperature? 0.3V 2 m V per degree Celsius 0.7V 1 V None of these TRUE ANSWER : ? YOUR ANSWER : ?
Which one of the following statements applies to common auto batteries? None of these Auto batteries are primary wet-cell batteries Auto batteries are primary dry-cell batteries Auto batteries are secondary dry-cell batteries Auto batteries are secondary wet-cell batteries TRUE ANSWER : ? YOUR ANSWER : ?
Two diodes are in series. The first diode has a voltage of 0.75 V and the second has a voltage of 0.8 V. If the current through the first diode is 500 mA, what is the current through the second diode 12 mA None of these 10 mA 14 mA 11 mA TRUE ANSWER : ? YOUR ANSWER : ?
An unloaded zener regulator has a source voltage of 20 V, a series resistance of 330 W, and a zener voltage of 12 V, What is the Zener current? None of these 24.2 mA 34.4 mA 68.4 mA 28.4 mA TRUE ANSWER : ? YOUR ANSWER : ?
The saturation point is approximately the same as cutoff point upper end of the load line None of these infinity lower end of the load line TRUE ANSWER : ? YOUR ANSWER : ?
A certain electromagnet has 1000 turns of wire. How much current must flow through the coil in order to generate an mmf of 100 ampere-turns? 0.41666666666667 None of these 0.1 A 100 A 1000 A TRUE ANSWER : ? YOUR ANSWER : ?
What is the difference between a conductor and an insulator? An insulator has an excessive number of free electrons, while a conductor has a few free electrons or none at all The difference between conductors and insulators depends on how they are used A conductor allows current to flow much easier than an insulator does None of these An insulator allows current to flow much easier than a conductor does TRUE ANSWER : ? YOUR ANSWER : ?
Household light bulbs have a given power rating, and they operate at 120 V. Which one of the following equations most directly provides the current rating of these light bulbs? P = I2R P = E2/R I = P/E P = IE None of these TRUE ANSWER : ? YOUR ANSWER : ?
Which one of the following statements is true for the voltages in a series RC circuit? The voltage always has the same amplitude and phase for every part of the circuit The total voltage is greater than the sum of the voltages across the resistance and capacitance The total voltage is equal to the sum of the voltages across the resistance and capacitance The total voltage is less than the sum of the voltages across the resistance and capacitance None of these TRUE ANSWER : ? YOUR ANSWER : ?
When the Q point moves along the load line, the voltage increases when the current Stays the same Can be any of above None of these Increases Decreases TRUE ANSWER : ? YOUR ANSWER : ?