You attach your solenoid from problem #7 to a G-V \"lantern\" battery. Determine

Question

You attach your solenoid from problem #7 to a G-V "lantern" battery. Determine the current in your solenoid at a time of 1.00 ms after the battery has been attached. Cars use a solenoid in their starters, which draws a large current from the battery in order to start the engine. If the starter solenoid has an inductance of 8.00 mH determine the energy stored by the starter solenoid when the current is equal to 5.00 A. Continuing with cars and starter solenoids, you know that the applied voltage is 12.0 V coming from the car battery. The 8.00 mH solenoid is connected in series to a 1.00 Ohm resistor. How long does it take for the current to reach 95% of its maximum value?

Explanation / Answer

Q8 is related to #7. Which can't be answered without #7.

9)
L = 8 mH = 8*10^-3 H
i = 5 A
E = 0.5*L*i^2
= 0.5*(8*10^-3)*(5)^2
= 0.1 J
Answer: 0.1 J

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