Inductors The inductance of an iron-core coil decreases if the iron core is removed the number of turns is decreased the length of the coil decreases None of these the iron core is removed the number of turns is decreased the length of the coil decreases None of these ANSWER DOWNLOAD EXAMIANS APP
Inductors A sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, the current is decreased momentarily goes to zero does not change is increased is decreased momentarily goes to zero does not change is increased ANSWER DOWNLOAD EXAMIANS APP
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 57 mA 78 mA 400 mA 91 mA 57 mA 78 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 180 mV 18 mV 1.8 mV 1.25 mV 180 mV 18 mV 1.8 mV 1.25 mV ANSWER DOWNLOAD EXAMIANS APP
Inductors 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 870 mA 87 mA 87 A 337 mA 870 mA 87 mA 87 A ANSWER DOWNLOAD EXAMIANS APP
Inductors A 5 mH, a 4.3 mH, and a 0.6 mH inductor are connected in parallel. The total inductance is less than 0.6 mH 9.9 mH greater than 5 mH 9.9 mH or greater than 5 mH less than 0.6 mH 9.9 mH greater than 5 mH 9.9 mH or greater than 5 mH ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS