lab 1 - enel 280 - eletrical circuits
TRANSCRIPT
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8/16/2019 Lab 1 - ENEL 280 - eletrical circuits
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Summary:
The ampacity of conductor is how much current a conductor can carry before deterioration. It
depends on resistance, insulation and frequency of current and heat. The main aim of our
experiment was to design electric circuit in series and through ohm law we would find relation
between current and voltage.
Objective
In the experiment the objective is measure the current, voltage and power across the resistorthrough connecting devices in series.
After circuit setup, we would then find power disspation.
Equipment & Components required
Digital ultimeterIndustrial experiment board
!onnecting wires
D! power "upply
Test Method:
#$ %e first ma&e sure each resistors of #'( lamps should have approximated ) *hms.
'$ %ith voltage source being set to #'v. %e connect # lamp and measure its current and
voltage drop, then we connect the 'nd lamp in series with it and do same procedure for + rd
one.+$ (oltage also drops from #' ( to ( then )(.
)$ -sing ohm law we find resistance of each lamp.
$ %e then find power dissipation and calculate its total.
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8/16/2019 Lab 1 - ENEL 280 - eletrical circuits
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• -sing the D, measure the *// resistance of the #'( lamps
0esistance1
2amp #1 0esistance 3 ) 4.
2amp '1 0esistance 3 ).' 4
2amp +1 0esistance 3 ) 4.
(oltage1
2amp #1 (oltage 3 #'(
2amp '1 (oltage 3 #'(
2amp +1 (oltage 3 #'(
!urrent1
2amp #1 (30.I I3#'5) 3 +A
2amp '1 (30.I I3#'5).' 3'.6A
2amp +1 (30.I I3#'5) 3 +A
2amp #, 2amp ' and 2amp+ in "eries
!urrent1 7.86A
(oltage1 #'(
0esistance1 #'.'4
• !alculate expected power dissipation for each case. !alculate the total power
2amp # 9 3 I: . 0 3 +: . ) 3 + %
2amp ' 9 3 I: . 0 3 '.6: . ) 3 +',8'%
2amp + 9 3 I: . 0 3 +: . ) 3 + %
9total 3 I:;# %
• "et the power supply to #'( and connect # lamp. easure the current and the voltage
drop with the D, then calculate the *? resistance
(oltage1
2amp # 3 #'(
2amp # ; 2amp ' 3 #'(
2amp # ; 2amp ' ; 2amp + 3 #'(
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8/16/2019 Lab 1 - ENEL 280 - eletrical circuits
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!urrent1
2amp # 3 7.+76A
2amp # ; 2amp ' 3 7.'7A
2amp # ; 2amp ' ; 2amp + 3 7.#)A
(oltage Drops1
2amp #1 ( 3 0I 3 ) . 7.+76 3 #.'+'(
2amp # ; 2amp ' 3 ( 3 0I 3 ).' . 7.'7 3 7.6'(
2amp # ; 2amp ' ; 2amp + 3 ( 3 0I 3 ) . 7.#) 3 7.(
• !alculate the power dissipation for each case, based on your measurements. !alculate the
total power dissipation
9ower dissipation for1
2amp # 3 7.+6%
2amp # ; 2amp ' 3 7.+%
2amp # ; 2amp ' ; 2amp + 3 7.++%
0eal 9ower1
2amp # 3 +).'%
2amp # ; 2amp ' 3 #>.'%
2amp # ; 2amp ' ; 2amp + 3 ##.'%
Analysis:
It is possible to observe that after flow in there is potential drop across circuit. And also the
power in the circuit is less than the expected power because the resistance will &eep some energy
for it.
Conclusion/discussion:
%e noticed that the resistance values found in calculations were different then the values wemeasured with the multimeter. That difference occurs because off the temperature@ when turned
on, the 2D glows and slowly starts to get warmer, and this heating increases the former
resistance of the 2D, ma&ing the difference between the two values.
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?ame1 /elipe (ieira !amargo
ID1 '77+8#
!lass and "ection1 nel '67 B 78#
2ab1 7#
Date1 ay ', '7#
Croup embers 1 "huaihao hao