A sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, the current is decreased is increased momentarily goes to zero does not change 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 : ?
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? 66 kΩ 219 kΩ 660 kΩ 1.3 MΩ TRUE ANSWER : ? YOUR ANSWER : ?
An inductance of 0.43 mH is smaller than 0.00043 H 430 μH 43 μH 0.05 H TRUE ANSWER : ? YOUR ANSWER : ?
Five inductors are connected in series. The lowest value is 8 μH. If the value of each inductor is twice that of the preceding one, and if the inductors are connected in order of ascending values, the total inductance is 8 H 32 μH 248 μH 64 μH TRUE ANSWER : ? YOUR ANSWER : ?
The winding resistance of a coil can be increased by changing the core material increasing the number of turns or using thinner wire using a thinner wire increasing the number of turns TRUE ANSWER : ? YOUR ANSWER : ?
Two inductors, L1 and L2, are in parallel. L1 has a value of 25 H and L2 a value of 50 H. The parallel combination is in series with L3, a 20 H coil. The entire combination is across an ac source of 60 Vrms at 300 kHz. The total rms current is 337 mA 87 A 870 mA 87 mA 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 greater than 5 mH less than 0.6 mH 9.9 mH or 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 6 V 12 V 4 V 0 V TRUE ANSWER : ? YOUR ANSWER : ?
A 240 H inductor is equivalent to a 0.000240 mH inductor 240 mH inductor 240 H inductor 0.240 mH inductor TRUE ANSWER : ? YOUR ANSWER : ?