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# Inductor then recall the inductance in a solenoid 12 u

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Unformatted text preview: inductor, L.   First recall what we know about the capacitor. C - Q0 +Q0 Physics 2B - Summer Session 2 - C. Palmer August 28, 2013 31 L   Let us exam a charged capacitor, C, with an inductor, L.   First recall what we know about the capacitor. C Q0 VC,0 = C 2 1 Q0 ETotal = 2C Physics 2B - Summer Session 2 - C. Palmer - Q0 +Q0 August 28, 2013 32 L   Let us exam a charged capacitor, C, with an inductor, L.   First recall what we know about the capacitor. Q0 VC,0 = C 2 1 Q0 ETotal = 2C C - Q0 +Q0 dI VL,0 = L = 0 dt 12 EL = LI = 0 2 Physics 2B - Summer Session 2 - C. Palmer August 28, 2013 33 L   Now we close the switch and we have current flowing and the capacitor is discharging.   What should the equation from Kirchhoff ’s loop rule be? A) C) 2 0 C - Q0 +Q0 B) Q dI +L =0 C dt D) 2 1Q 1Q 1 2 = + LI 2C 2C 2 dQ I= dt I Q + LI = 0 C Physics 2B - Summer Session 2 - C. Palmer August 28, 2013 34 L   Now we close the switch and we have current flowing and the capacitor is discharging.   What should the equation from Kirchhoff ’s loop rule be? A) C) 2 0 C - Q0 +Q0 B) Q dI +L =0 C dt D) 2 1Q 1Q 1 2 = + LI 2C 2C 2 dQ I= dt I Q + LI = 0 C Physics 2B - Summer Session 2 - C. Palmer August 28, 2013 35 L 2π T= ω Physics 2B - Summer Session 2 - C. Palmer August 28, 2013 I C - Q0 +Q0 36 L What is the current when the charge on the capacitor is one quarter the original value? I C A) Q0 I= 4 B) 1 LC C)I = Q 15 1 0 16 LC 3 1 I = Q0 4 LC D) I = Q 0 31 4 LC Physics 2B - Summer Session 2 - C. Palmer - Q0 +Q0 2 1Q EC = 2C 12 EL = LI 2 August 28, 2013 37 L What is the current when the charge on the capacitor is one quarter the original value? I C A) Q0 I= 4 B) 1 LC C)I = Q 15 1 0 16 LC 3 1 I = Q0 4 LC D) I = Q 0 31 4 LC Physics 2B - Summer Session 2 - C. Palmer - Q0 +Q0 2 1Q EC = 2C 12 EL = LI 2 August 28, 2013 38 L What is the current when the charge on the capacitor is one quarter the original value? I C 2 1 2 1 ⎛ Q0 ⎞ 1 2 Q0 = ⎜ ⎟ + LI 2C 2C ⎝ 4 ⎠ 2 15 2 2 Q0 = LI ⇒ I = Q0 16C - Q0 +Q0 2 1Q EC = 2C 15 1 12 16 LC EL = LI 2 Physics 2B - Summer Session 2 - C. Palmer August 28, 2013 39...
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## This note was uploaded on 09/10/2013 for the course PHYS 2B 2b taught by Professor Hirsch during the Summer '10 term at UCSD.

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