Done by : Mohd Fathllah Bin Rosli (ND/AVT/19)
8/7/2019 Technical Report-presentation0
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Done by : Mohd Fathllah Bin Rosli
(ND/AVT/19)
8/7/2019 Technical Report-presentation0
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Done by : Mohd Fathllah Bin Rosli
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�Introduction ----------------- 1
�Theoretically-----------------2-9Formula--------------------- 4-5
�Practically-----------------10-12
�Conclusion--------------------13
8/7/2019 Technical Report-presentation0
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Done by : Mohd Fathllah Bin Rosli
(ND/AVT/19)
� This Topic is about calculating:
¾ RESISTANCE
¾ CURRENT
¾ Voltage Drop
TO SHOW AND PROVE THAT THE CURRENT AND VOLTAGE OFANY RESISTORS IN SERIES OR PARALLEL CIRCUIT CAN BE
CALCUATED THEORITICALLY AND MEASURED PRACTICALLY
1
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� Accessories such as«.
Paper
Calculator
Pen or Pencil
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� Equipments such as««
Resistor
Power Supply
Digital Multi-meter
Bread board
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Done by : Mohd Fathllah Bin Rosli
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� How to calculate resistance in series , parallel andseries parallel circuits
¾ Series circuits- RT =R1+R2
¾ Parallel Circuit- RT =R1xR2/R1+R2
¾ Series-Parallel circuit- First calculate the parallel resistorsand then the series
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� How to calculate voltage , current and resistance
¾ Voltage- Resistance x Current (Ohm x Amps)
¾ Current- Voltage / Resistance (Volts/Ohms)
¾ Resistance- Voltage/Current(Volts/Ohms)
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� Calculate the total resistance� Calculate the current flow across R1� Calculate the total current
R1-75 �
R2-75 �
6 V
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Done by : Mohd Fathllah Bin Rosli
(ND/AVT/19)
Calculate total resistance,
RT = R1xR2/R1+R2
=75 �x75 �/75 �+75 �
=37.5�
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Back to the
diagram
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Calculate The Current Flow Across R1
I=V / R
=6 Volt / 75 �
=0.08amp
8
Back to the
diagram
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Done by : Mohd Fathllah Bin Rosli
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Calculate the total current
IT=V/RT
=6 Volt /37.5 �
=0.16 Amps
9
Back to the
diagram
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Measuring Total Resistance
We can use either Avo-meter or Digital Multi-meter byconnecting lead positive and lead negative to the circuit.
For digital multi-meter press button ´�µ.
Reading we get:37.463 �
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Measuring the current flow across R1
To measure current, connect the positive and
negative lead in series with R1.Then press the ´Aµbutton.
Reading:0.0793Amps
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Measuring The Voltage Drop
In measuring Voltage press the V(DC)button place thelead at the resistor
Reading:6.32 volt
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A Theory Practical
Total Resistance 37.5� 37.463�
Current across R1 0.8Amps 0.0793Amps
Supply Voltage Given[6 volt] 6.32 Volt
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� The calculation that we get from theory is slightlydifferent from practical.
� This is because of the tolerance from each resistor is may effect the calculation that come out from
practical.
� Apart from that, some reasons that effecting in thecalculation result is because of the error, resistance
in our body, and maybe because of thecalibrating problem of equipment that we used
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� www.wikkipedia.org
� www.101science.com
� www.hobbyproject.com
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