Lab Project SKMM 3242

THEVENIN’S THEOREM AND WHEATSTONE BRIDGE 

Lab Sheet: (PDF) (IMG)

OBJECTIVES:

  1. To analyze an unbalanced Wheatstone bridge using Thevenin’s Theorem.

LIST OF REQUIREMENTS:

1.Equipments

  1. DC power supply.
  2. Voltmeter/ Galvanometer
  3. Digital multimeter.

2.Components

  1. Resistor: 1kΩ, 10kΩ, 47kΩ, 100kΩ

THEORY:

1.INTRODUCTION

In this experiment, we have learned about the Thevenin’s Theorem and Wheatstone bridge. Firstly, we will learn how to analyze an unbalanced Wheatstone bridge using Thevenin’s Theorem. Secondly, we will learn how to calculate the value of  and  using Thevenin’s Theorem.

2.THEVENIN’S THEOREM

Thevenin’s Theorem states that a linear two-terminal circuit can be replaced by an equivalent circuit consisting of a voltage source  in series with a resistor , where  is the open-circuit voltage at the terminals and  is the input or equivalent resistance at the terminals when the independent sources are turned off.