One application of an RL circuit is the generation of time-varying high voltage from a low-voltage source (E = 11.0 V), as shown in the figure below. B 82.00 H E1 200 2 12.00 (a) What is the current in the circuit a long time after the switch has been in position A? A (b) Now the switch is thrown quickly from A to B. Compute the initial voltage across each resistor and the inductor. V (12 0 resistor) kV (1,200 n resistor) kV (inductor) (c) How much time elapses before the voltage across the inductor drops to 11.0 V? ms

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Electromagnets

The word "electromagnet" is composed of two words, ‘electro’ and ‘magnet’. It is a type of magnet in which an electric current helps in the generation of a magnetic field. Electromagnets usually consist of two major parts, wire and a coil around which the wire is wound. This is called a solenoid. When an electric current is allowed to pass through the coiled wire, the electric current produces a magnetic field. This magnetic field is present only when current is passing through the wire.