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September 17, 2014

September 17, 2014

Posted by **Anonymous** on Monday, October 8, 2012 at 9:45pm.

is connected by a long wire to a resistor R = 8.0 ohms. The

wire goes around a solenoid. The

solenoid has 4000 turns per meter and area 25 cm^2.

a) If the current in the solenoid is I = 200 Amps and is

constant, then what is the current through the 8 ohm resistor?

b) If the current in the solenoid is I(t) = 200 cos(120(pi)t),

then what is the maximum current through the 8 n resis

tor?

c) Is the battery ever being charged when the current in

the solenoid is I(t) = 200cos(120(pi)t)?

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