ACTIVITY 7 DATA SHEET
Name: ____________________________________ Date Performed: __________________
Course Code & Section: _____________________________
DMM Model: _________________ DMM Type: __________________________________
KIRCHHOFF’S RULES
A. GIVEN RESISTORS AND MEASURED VOLTAGES
Resistors
Measured Voltages
𝑅1 =
𝑉1 =
volts
𝑅2 =
𝑉2 =
volts
𝑅3 =
B. CIRCUIT CALCULATIONS USING KVL AND KCL
Figure A. Circuit with assumed currents
KCL at node e:
KVL around loop 1 (loop abgfea):
KVL around loop 2 (loop efgdce):
Solution for 𝐼1, 𝐼2, and 𝐼3.
C. MEASURED CURRENTS
Measured
Currents
(amperes)
𝐼1 =
𝐼2 =
𝐼3 =
Figure B. Circuit with correct direction of currents
D. COMPARISON
Current
Calculated Value
(amperes)
Measured Value
(amperes)
% difference
𝐼1
𝐼2
𝐼3
Manzano, Enrique (2020 December). For DLSU use only. NOT FOR CITATION, SALE, NOR
REDISTRIBUTION.
PHYSICS DEPARTMENT
College of Science
De La Salle University - Manila
KIRCHHOFF’S RULES
Guide Questions
1. Why must both batteries/power sources be connected when the terminal
voltage across each of them was measured?
2. State the conservation laws that govern Kirchhoff’s Current Law and Kirchhoff’s
Voltage Law.
3. The terminal voltage of a battery is not in general equal to its emf when the
battery is connected to a circuit. Why is this so?
4. Which battery in the circuit supplies power to the circuit? Which battery is being
charged or absorbing power?
5. What is the significance of a negative calculated value for current in a branch?
Manzano, Enrique (2020 December). For DLSU use only. NOT FOR CITATION, SALE, NOR
REDISTRIBUTION.