The winding resistance of a coil can be increased by using a thinner wire increasing the number of turns changing the core material increasing the number of turns or using thinner wire 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? 660 kΩ 66 kΩ 219 kΩ 1.3 MΩ 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 55 mH less than 5.5 mH 5.5 mH less than 0.2 mH TRUE ANSWER : ? YOUR ANSWER : ?
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? 57 mA 91 mA 400 mA 78 mA TRUE ANSWER : ? YOUR ANSWER : ?
An inductance of 0.43 mH is smaller than 430 μH 0.00043 H 43 μH 0.05 H TRUE ANSWER : ? YOUR ANSWER : ?
A 240 H inductor is equivalent to a 0.000240 mH inductor 240 H inductor 240 mH inductor 0.240 mH inductor 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 64 μH 8 H 248 μH 32 μH 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? 48 s 0.48 ms 0.48 μs 0.48 s TRUE ANSWER : ? YOUR ANSWER : ?
The voltage across a coil when di/dt = 20 mA/s and L = 8 H is 1.6 mV 2.5 mV 16 mV 160 mV TRUE ANSWER : ? YOUR ANSWER : ?
A sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, the current is increased momentarily goes to zero is decreased does not change TRUE ANSWER : ? YOUR ANSWER : ?