Inductors A switch, a 220 Ω resistor, and a 60 mH inductor are in series across a 20 V battery. What is the current through the inductor two time constants after the switch is closed? 91 mA 78 mA 57 mA 400 mA 91 mA 78 mA 57 mA 400 mA ANSWER DOWNLOAD EXAMIANS APP
Inductors The current through a 120 mH coil is changing at a rate of 150 mA/s. The voltage induced across the coil is 1.8 mV 18 mV 1.25 mV 180 mV 1.8 mV 18 mV 1.25 mV 180 mV ANSWER DOWNLOAD EXAMIANS APP
Inductors 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 219 kΩ 1.3 MΩ 660 kΩ 66 kΩ 219 kΩ 1.3 MΩ ANSWER DOWNLOAD EXAMIANS APP
Inductors 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? 48 s 0.48 ms 0.48 μs 0.48 s 48 s 0.48 ms 0.48 μs 0.48 s ANSWER DOWNLOAD EXAMIANS APP
Inductors The inductance of an iron-core coil decreases if the length of the coil decreases the number of turns is decreased None of these the iron core is removed the length of the coil decreases the number of turns is decreased None of these the iron core is removed ANSWER DOWNLOAD EXAMIANS APP
Inductors 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 32 μH 248 μH 8 H 64 μH 32 μH 248 μH 8 H 64 μH ANSWER DOWNLOAD EXAMIANS APP
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