A 90.0 mH inductor is connected in a circuit. The current through the inductor is given by the function t²-6¹. Estimate the time at which the emf will reduce to zero.
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- If the current in an inductor is tripled, by what factor is the stored energy multiplied?Current in a circuit falls from 5.0 A to 0.0 A in 0.1 s. If an average emf of 200 V induced, give an estimate of the self-inductance of the circuit.In the given circuit an inductor of L = 6.20-mH and a resistor of R = 12.4-2 resistor are connected in series with a dc battery of E = 3.90-V. E ll R L S What is the voltage across the resistor immediately after the switch is closed?
- A 3.5 mH inductor and a 4.5 mH inductor are connected in series and a time varying current is established in them. When the total emf of the combination is 16 V, what is the emf of the larger inductor?A loop of wire has a self-inductance of 5.5 mH. You pass a current of 9.0 Amps though the loop, and then drop the current to 0 at a contastant rate over 3.5 seconds. What is the EMF generated?A 10 -mH inductor and a 25 MF (micro F) capacitor are connected in parallel. The combination is in series with a resistor and a 15 Ohm resistor and 10V, 160Hz emf. (a) What is the current through the resistor? (b) What is the phase angle?
- An alternating emf source with a variable frequency fa is connected in series with a 43.02 resistor and a 19.0 μF capacitor. The emf amplitude is 11.0 V. Consider a phasor diagram for phasor VR (the potential across the resistor) and phasor Vc (the potential across the capacitor). (a) At what driving frequency fa do the two phasors have the same length? At that driving frequency, what are (b) the phase angle in degrees, (c) the angular speed at which the phasors rotate, and (d) the current amplitude? (a) Number i 216.4 (b) Number i 45 (c) Number i 1361.6 (d) Number i 158 Units Units Units Units Hz (degrees) rad/s mAA 14.0 mH inductor makes the current drop from 178 mA to 66.0 mA in only 10.0 μs. What is the potential difference across the inductor? 0.00157 V -92.4 V -249 V 157 VA circuit consists of a 40 Ω resistor and a690 mH inductor connected in series to a 14 Vbattery. What is the value of the current when thecurrent is increasing at the rate of 7 A/s?Answer in units of A
- A 12.0-V battery is connected in series to a 25.0-Ohm resistor and a 5.00-H inductor. How much energy in Joules is stored in the inductor when the current is changing at a rate of 1.00 A/s?L,C and R represent the physıcal quantities inductance, capacitance and resistance respectively. The combinations which have the dimensions of frequency are (a) RC R (b) L (c) VIC (d) i L