Other
Phys 1000 - The laws of electrical circuits Experiment
- Course
- Physics major
- Institution
- University Of The Witwatersrand (wits)
This document contains detailed notes on Experiment 6 : The laws of electrical circuits for Phys 1000
[Show more]
Content preview
THE LAWS OF ELECTRICAL CIRCUITS1. PRINCIPAL OBJECTIVE: To calculate current and voltage in a series and parallel DC
Circuits.
2. AIMS:
To investigate the laws governing current and potential difference in electrical
circuits
To practise connecting electrical circuits.
3. THEORY.
The laws of electricity that can be used to analyse electrical circuits are Kirchhoff’s laws of
current and voltage. Electrical circuits consist of electrical components connected to each other
by electrical leads. The most basic components of a circuit are:
1. An Ammeter that is used to measure current flowing within the circuit.
2. A Voltmeter that is used to measure potential difference/voltage across the circuit.
3. A Resistor that is used to measure resistance within the circuit.
A circuit can have two types of connections, a series and a parallel connection. The main
purpose of this experiment is to use Kirchhoff’s voltage and current laws to find the voltage and
current at the resistors in the circuits.
Kirchhoff’s s law for current (KCL) states that; at any node in closed electrical circuit, the sum
Of electrical currents flowing into that node are equal to the sum of currents flowing out of that
node
Kirchhoff’s law for voltage (KVL) states that; the sum of the electrical voltage around any closed
Network (circuit) is zero and the sum of emfs in any closed loop is equivalent to the sum of the
potential drop in that loop. The sum of the products of the resistances of the conductors and
the currents in them in a closed loop is equal to the total emfs available in that loop.
4. RESULTS
Table 1: measurement of the current in series circuit
Error in Ammeter = 0.1/2 = ±0.05
R2 (Ω) I1 (A) I2 (A) I3 (A)
1.0 0.8±0.05 0.8 ±0.05 0.8 ±0.05
2.0 0.7 ±0.05 0.7 ±0.05 0.7±0.05
3.0 0.6 ±0.05 0.6 ±0.05 0.6 ±0.05
4. 0 0.55 ±0.05 0.55 ±0.05 0.55 ±0.05
5.0 0.5 ±0.05 0.5±0.05 0.5 ±0.05
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through EFT, credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller anyiamgeorge19. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for R202,90. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
48298 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy summaries for 15 years now