06:35What are inductors? (self-inductance) | Electromagnetic induction | Khan AcademyKhan Academy India - English476views
Multiple ChoiceA 30mH inductor carries a current of 500mA. If the circuit is opened and the current stops over a period of 3.0μs, what potential develops across the inductor?254views
Textbook QuestionA toroidal solenoid has mean radius 12.0 cm and crosssectional area 0.600 cm^2. (a) How many turns does the solenoid have if its inductance is 0.100 mH?322views1rank
Textbook QuestionThe inductor shown in Fig. E30.11 has inductance 0.260 H and carries a current in the direction shown. The current is changing at a constant rate. (a) The potential between points a and b is Vab = 1.04 V, with point a at higher potential. Is the current increasing or decreasing?644views
Textbook QuestionWhen the current in a toroidal solenoid is changing at a rate of 0.0260 A/s, the magnitude of the induced emf is 12.6 mV. When the current equals 1.40 A, the average flux through each turn of the solenoid is 0.00285 Wb. How many turns does the solenoid have?917views
Textbook QuestionHow much energy is stored in a 3.0-cm-diameter, 12-cm-long solenoid that has 200 turns of wire and carries a current of 0.80 A?168views
Textbook QuestionAssuming the Earth’s magnetic field averages about 0.50 x 10⁻⁴ T near the surface of the Earth, estimate the total energy stored in this field in the first 5.0 km above the Earth’s surface.131views
Textbook Question(II) A long straight wire of radius r carries current I uniformly distributed across its cross-sectional area. Find the magnetic energy stored per unit length in the interior of this wire.35views
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