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# Answer to Question #253944 in Electrical Engineering for Sree

Question #253944
Problem 0.1
Figure 0.1 shows the circuit diagram of a magnetic stimulator made by an international biomedical electronics company. The pulsed magnetic field generated by the transducer coil (represented by the inductor) can be used in a variety of medical treatments including nerve stimulation. The capacitor is precharged to a Voltage V, between 0 and 1000 V, and then at /-0 the switch S is closed to trigger the magnetic pulse.
Calculate the following assuming that the switch S and the diode D are ideal:
1. The time response of the coil current after the switch S is closed, as a function of the precharge voltage V. (Some types of stimulation require a field with a fast rise time and a slow fall time.)
2. The peak coil current for V, - 950 V.
3. The time 1, at which diode D turns on.
4. The energy dissipated in the resistor for VÃ   ¢  -950 V.
i coil
+
L=11 uH
R=85 m2
Vc
C=180 uF
D
1
2021-10-19T23:11:22-0400

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