Two 10 H inductors are in parallel and the parallel combination is in series with a third 10 H inductor. What is the approximate total reactance when a voltage with a frequency of 7 kHz is applied across the circuit terminals? 660 kΩ 66 kΩ 1.3 MΩ 219 kΩ TRUE ANSWER : ? YOUR ANSWER : ?
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 VR ≥ VL VL < VR VL > VR 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 less than 0.6 mH 9.9 mH 9.9 mH or greater than 5 mH greater than 5 mH TRUE ANSWER : ? YOUR ANSWER : ?
An inductor, a 1 k resistor, and a switch are connected in series across a 6 V battery. At the instant the switch is closed, the inductor voltage is 4 V 12 V 6 V 0 V TRUE ANSWER : ? YOUR ANSWER : ?
The inductance of an iron-core coil decreases if the iron core is removed the length of the coil decreases None of these the number of turns is decreased TRUE ANSWER : ? YOUR ANSWER : ?
The winding resistance of a coil can be increased by changing the core material increasing the number of turns increasing the number of turns or using thinner wire using a thinner wire TRUE ANSWER : ? YOUR ANSWER : ?
A 240 H inductor is equivalent to a 0.240 mH inductor 240 mH inductor 240 H inductor 0.000240 mH inductor 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 : ?
A 2 mH, a 3.3 mH, and a 0.2 mH inductor are connected in series. The total inductance is less than 5.5 mH 5.5 mH less than 0.2 mH 55 mH TRUE ANSWER : ? YOUR ANSWER : ?
An ohmmeter is connected across an inductor and the pointer indicates zero ohms. The inductor is open partly shorted shorted good TRUE ANSWER : ? YOUR ANSWER : ?