Inductors - General Questions (2)

When the current through an inductor decreases, the amount of energy stored in the electromagnetic field

The current through a 120 mH coil is changing at a rate of 150 mA/s. The voltage induced across the coil is

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

An inductance of 0.43 mH is smaller than

The winding resistance of a coil can be increased by

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

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 V_rms at 300 kHz. The total rms current is

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