Doubling the diameter of the coil in an inductor: reduces the value of inductance by one-half None of these multiplies the value of inductance by two reduces the value of inductance by one-fourth multiplies the value of inductance by four TRUE ANSWER : ? YOUR ANSWER : ?
Doubling the operating frequency of an inductive circuit: multiplies the inductive reactance by 6.28 has no effect on the inductive reactance cuts the inductive reactance in half None of these doubles the amount of inductive reactance TRUE ANSWER : ? YOUR ANSWER : ?
What is the smallest number of polarities required for current flow? Three - negative, positive and neutral terminals Four - two negative and two positive None of these One - a negative terminal Two - a negative terminal and a positive terminal TRUE ANSWER : ? YOUR ANSWER : ?
How many protons does the nucleus of a silicon atom contain? 48 None of these 14 29 4 TRUE ANSWER : ? YOUR ANSWER : ?
Which one of the following statements is true for the voltage in a parallel RL circuit? The total voltage is equal to the sum of the voltages across the resistance and inductance None of these The total voltages is less than the sum of the voltages across the resistance and inductance The voltage always has the same amplitude and phase for every part of the circuit The total voltage lags the total current by less than 90 TRUE ANSWER : ? YOUR ANSWER : ?
Which one of the following statements most accurately describes the nature of inductive reactance? Inductive reactance is a force that tends to overcome the effects of counter emf Inductive reactance is an opposition to current flow in dc circuits None of these Inductive reactance is an opposition to current flow in ac circuits Inductive reactance is another term for counter emf TRUE ANSWER : ? YOUR ANSWER : ?
Which is the most widely used semiconductor? Germanium Silicon Copper None of these All of these TRUE ANSWER : ? YOUR ANSWER : ?
The barrier potential accross each depletion layer is 0.7 V None of these 20 V 0.8 V TRUE ANSWER : ? YOUR ANSWER : ?
A dielectric material is: a poor conductor of electrostatic fields a good conductor of magnetic fields None of these a good conductor a good insulator TRUE ANSWER : ? YOUR ANSWER : ?
The north pole of a magnet is the one: that would be repelled by the south pole of another magnet that has its molecules arranged in a random pattern None of these that would be attracted to the earth's north magnetic pole that would be attracted to the earth's south magnetic pole TRUE ANSWER : ? YOUR ANSWER : ?