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Instructor’s informal sessions:

• Tu 3:30-4:20pm, RAS 213.
• Fri 4-4:50pm, ECJ 1.204.

Lecture: 17 Direct Current Circuits – III (iq13)

RC-circuit for discharging a capacitor

• The loop equation
• i= - dq_plate/dt --- for the discharging case
• Characteristic time of the circuit is the same.

Conservation of energy equation: ( I ´ loop-equation)

• “P=IV”
• Charging case: P_emf=P_R+P_C
• Discharging case: P_R = P_C (released)

Hints on HW6: Q9,17-20

Reminder:

• There is the regularly instructor’s informal section today, see time and place above.