Resistors, Kirchhoff's Rule - Examples - Calculus Based Physics I | PHYS 2110, Study notes of Physics

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Formulas for Test 2

(all the ones from Test 1)

28.1 (continued)

Example: A 1.50volt battery delivers 2.25 A when connected

to an ammeter with a resistance of 0.600Ω. What is the

battery's internal resistance?

Parallel:

The voltage across each device is the same in parallel, but the currents can different.

Example:this circuit: a) Find the equivalent resistance of the resistors in

b) Find the current through the 50 Ω resistor.

c) What's the voltage across the first 100 Ω resistor?

Junction Rule

(Kirchhoff's Current Rule (KCR):

(Conservation of charge)

The sum of the currents entering any circuit junction must

equal the sum of the currents leaving the junction.

Example: Find the current through & voltage across the 250 Ω resistor in this circuit:

• HW due Wed: up through (including) problem