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Summary Btec applied science Unit 15 electrical circuit's and their Applications

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  • October 1, 2023
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Id number: 40180702
Name: Analies Fatima Pires Unit 15: Electrical Circuits and their
Applications
Assignment title: Electric Circuits

Pearson BTEC Level 3 National Extended Certificate in Applied
Science
Qualification Pearson BTEC Level 3 National Foundation Diploma in Applied
Science


Unit number Unit 15: Electrical Circuits and their
and title
Applications
A: Understand electrical symbols, units, definitions, relationships
and properties of circuit components for use in the construction of
Learning aim circuits.
B: Construct series and parallel circuits for use in standard electrical
applications and measure electrical values.
Assignment
title Electric Circuits
Assessor

21/02/2022
Issue date

Hand in 7/02/22
deadline


Criteria covered by this task:
Unit/Criteria
To achieve the criteria, you must show that you are able to:
reference
Explain principle electrical terms, quantities and relationships for
A. P1
given situations
Accurately construct a range of circuits and record appropriate
B. P2
values accurately using suitable measurement devices

, Demonstrate, by calculation, the use of principal electrical terms,
A.M1
quantities and relationships for given situations
Compare predicted and calculated fundamental electrical values for
B.M2
a range of circuit assembles

Evaluate, by calculation and graphical representation, the operation
A. D1
of a range of circuit assemblies using measured values

,Section 1 – Electrical symbols, units and definitions


Components Symbol

Cell - a cell is a device that generates
electricity by using chemical energy.


Battery - it is a device that takes chemical
energy and changes it to electrical energy.


Switch – it is an electrical component that can
Interrupt and divert an electric current from one
conductor to another by disconnecting or
connecting the conducting channel in an
electrical circuit.

Filament lamp -it is a type of bulb that is
widely used. With a thin layer of wire that
generates light sources. It is also a common
light lamp used for testing the electrical circuit
Whether the circuit is closed or open. The
resistance of a lamp increases as temperature
of its filament increases.

Fixed resistor -
It has fixed and defined resistance which is not
adaptable.

Thermistor
 Some devices break the rule we've just
explained and reduce their resistance as
temperature increases.
 This is because the extra energy makes
the atoms release electrons, allowing

, them to move more easily.


Light emitting diode (LED)
 They are made of semiconductors,
material with few charge carriers
available for conduction because
electrons are bound unless stimulated.
 Used as temperature sensor
Large change in resistance when
temperature changes.


Light dependent resistor (LDR)
 Light energy falling on LDR liberates
electrons from their atoms.
 Increasing light level increases the
number of electrons and decreases
resistance.
 Used as light sensors

Rheostat
 A resistor with different resistances for
controlling current.

Capacitor
 It is a device that stores electrical
charge, containing one or more pairs of
conductors separated by an insulator.


Voltmeter
It is an instrument used to measure electric
potential. Measured in volts.

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