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DC Circuit: Laboratory Manual

This document is a laboratory manual for an experiment to verify Kirchhoff's voltage and current laws using a circuit with five resistors and a variable power supply. The objective is to apply Kirchhoff's laws to analyze the voltage and current in each branch of the circuit. The procedure involves constructing the circuit, measuring voltages and currents using a multimeter, and using Kirchhoff's laws to verify the measurements match theoretical calculations based on the circuit components. Students are asked to report the measurements, calculations, and analyze any errors between measured and calculated values.

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Jigar Soni
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398 views4 pages

DC Circuit: Laboratory Manual

This document is a laboratory manual for an experiment to verify Kirchhoff's voltage and current laws using a circuit with five resistors and a variable power supply. The objective is to apply Kirchhoff's laws to analyze the voltage and current in each branch of the circuit. The procedure involves constructing the circuit, measuring voltages and currents using a multimeter, and using Kirchhoff's laws to verify the measurements match theoretical calculations based on the circuit components. Students are asked to report the measurements, calculations, and analyze any errors between measured and calculated values.

Uploaded by

Jigar Soni
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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DC CIRCUIT

(3320903)
LABORATORY MANUAL
Prepared by:
JIGAR SONI

Name:
Branch:

Division:

Semester:

Year:

Enrollment No.:

Roll No.:

1-1

Shree V & K Patel Institute of


Engineering-kadi

EXPERIMENT :
Kirchhoffs Voltage and Current Laws

Objective:

Verify Kirchhoffs Voltage Law (KVL) and Kirchhoffs Current Law (KCL) using mesh
and nodal analysis of the given circuit.
Equipment:

BREAD BOARD
Resistors.( 1 K (2) ,1.2 K (2), 2.4 K)
Theory:

1. Kirchhoffs Voltage Law states that the algebraic sum of all the voltages around any
closed path (loop or mesh) is zero.
Applying Kirchhoffs voltage law to the first and the second loops in the circuit
shown in Figure 1 yields:

Loop 1:
Loop 2:

-Vs +V1 +V2 +V5 = 0


-V2 +V3 +V4 = 0

(1a)
(1b)

Figur
e1

2. Kirchhoffs Current Law states that the algebraic sum of all the currents at any node is
zero. Applying Kirchhoffs current law to the first four nodes in the circuit
shown in
Figure1 yields the following equations;

Node a:
Node b:
Node c:
Node d:

-Is + I1 = 0
-I1 + I2 + I3 = 0
-I3 + I4 = 0
-I2 - I4 + I5 = 0

(2a)
(2b)
(2c)
(2d)

Procedure:

Construct the circuit shown in Figure 1 using the values


below: R1 = 1 K
R2 = 2.4
K R3 =
1.2 K R4
= 1 K R5
= 1.2 K
2. Set the Variable Power Supply (Vs) to 5 Volts.
3. Accurately measure all voltages and currents in the circuit using the Digital MultiMeter (DMM).
4. Record the measurements in a tabular form containing the measured voltage and
current values as shown below.

1-3

Branch
current/voltage

V [volts ]

I [mA]

R [K]

V1, I1
V2, I2
V3, I3
V4, I4
V5, I5
Vs, Is
5. Verify KVL for the loops in the circuit using equations 1a and 1b.
6. Verify KCL for the nodes in the circuit using equations 2a, 2b, 2c and 2d.

Questions for Lab Report:

1. Theoretically calculate the voltages and currents for each element in the circuit
and compare them to the measured values.
2. Compute the percentage error in the two measurements and provide a brief
explanation for the error.

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