An inductor and a resistor are in series with a sine wave voltage source. The frequency is set so that the inductive reactance is equal to the resistance. If the frequency is increased, then VL < VR VL > VR VL = VR VR ≥ VL TRUE ANSWER : ? YOUR ANSWER : ?
A 320 H coil is in series with a 3.3 k resistor. How long does it take for current to build up to its full value? 0.48 μs 0.48 s 0.48 ms 48 s TRUE ANSWER : ? YOUR ANSWER : ?
The inductance of an iron-core coil decreases if None of these the number of turns is decreased the length of the coil decreases the iron core is removed TRUE ANSWER : ? YOUR ANSWER : ?
A 240 H inductor is equivalent to a 0.240 mH inductor 0.000240 mH inductor 240 H inductor 240 mH inductor TRUE ANSWER : ? YOUR ANSWER : ?
A 5 mH, a 4.3 mH, and a 0.6 mH inductor are connected in parallel. The total inductance is 9.9 mH or greater than 5 mH less than 0.6 mH greater than 5 mH 9.9 mH TRUE ANSWER : ? YOUR ANSWER : ?
Three 15 mH inductors are in series. The total inductance is 45 mH 30 mH 15 mH 5 mH TRUE ANSWER : ? YOUR ANSWER : ?
When the current through an inductor is cut in half, the amount of energy stored in the electromagnetic field doubles is quartered quadruples does not change TRUE ANSWER : ? YOUR ANSWER : ?
The winding resistance of a coil can be increased by increasing the number of turns using a thinner wire changing the core material increasing the number of turns or using thinner wire TRUE ANSWER : ? YOUR ANSWER : ?
A sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, the current does not change is decreased momentarily goes to zero is increased TRUE ANSWER : ? YOUR ANSWER : ?
The current through a 120 mH coil is changing at a rate of 150 mA/s. The voltage induced across the coil is 18 mV 1.25 mV 180 mV 1.8 mV TRUE ANSWER : ? YOUR ANSWER : ?