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- Initially, an inductor with no resistance carries a constant current. Then the current is brought to a new constant value twice as large. After this change, when the current is constant at its higher value, what has happened to the emf in the inductor?A 90.0 mH inductor is connected in a circuit. The current through the inductor is given by the function t²-6. At 10 s what will be the magnitude of the induced emf?A circuit contains a 9 V battery, a 5 MΩ resistor, a 10 H inductor, and a switch. When the switch is closed, what isthe current in the circuit after 1 μsec?
- An inductor consists of 100 turns of wire tightly wound about an insulating core. It is attached to a power supply and when the current through it is increased from 0 to 5 A in 3, s an induced emf of 5 V is measured. Find the inductance of this device and the magnetic flux and the energy stored in the magnetic field when the current is held steady at 5 A.An RL circuit consists of a switch, an emf source E,, a 3.0 ka resistor, and a 1.0H inductor. If the potential across the resistor is 15.0 V 8.0 ms after the switch is closed, find the source emf, E..(a) If an inductor carrying a 1.95 A current stores an energy of 0.250 mJ, what is its inductance? Answer in mH (b) How much energy does the same inductor store if it carries a 3.1 A current? Answer in mJ
- A circuit consists of a 20 nF capacitor in series with a 20 µH inductor. If a charge of 30 nC is put on the capacitor, there is an oscillation. (a) What is the maximum current that moves through the circuit? (b) Find the maximum energy in the inductor and the in the capacitor? (c) What is the angular frequency of oscillation? What is the period? (d) Assume the trace resistance in the circuit is 0.102. Describe quantitatively and qualitatively the oscillation in the circuit.A constant voltage of 11.00 V has been observed over a certain time interval across a 2.30 H inductor. The current through the inductor, measured as 1.00 A at the beginning of the time interval, was observed to increase at a constant rate to a value of 8.00 A at the end of the time interval. How long was this time interval?A 19.0 mH inductor, an 6.00 Ω resistor, and a 9.00 V battery are connected in series. The switch is closed at t = 0. ( h) What is the maximum energy stored in the inductor?
- What is the inductance of a coil in which the average emf induced is 20.0 mV when the current in the coil is increased from 3.50 A to 7.70 A in 0.330 s?A 35.0 V battery with negligible internal resistance, a 50.0 Ohm resistor, and a 1.25 mH inductor with negligible resistance are all connected in series with an open switch. The switch is suddenly closed. How long after closing the switch will the current through the inductor reach one-half of its maximum value? How long after closing the switch will the energy stored in the inductior reach one-half of its maximum value?Remove the inductor from the circuit in the figure and set R = 216 Q, C = 18.6 µF, fd = 60.0 Hz, and &m = 36.0 V. What are (a) Z, (b) , and (c) I? 90 R L 000 (a) Number Units (b) Number Units (c) Number Units