EEE :: Inductors

A 240 H inductor is equivalent to a

A 2 mH, a 3.3 mH, and a 0.2 mH inductor are connected in series. The total inductance is

A 5 mH, a 4.3 mH, and a 0.6 mH inductor are connected in parallel. The total inductance is

The voltage across a coil when di/dt = 20 mA/s and L = 8 H is

A sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, the current

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?

An ohmmeter is connected across an inductor and the pointer indicates zero ohms. The inductor is

Two inductors, L_{1} and L_{2}, are in parallel. L_{1} has a value of 25 H and L_{2} a value of 50 H. The parallel combination is in series with L_{3}, a 20 H coil. The entire combination is across an ac source of 60 V_{r}_{m}_{s} at 300 kHz. The total rms current is

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