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Title: BTEC Applied Science Unit 17 Assignment 1
Description: Unit 17: Electrical Circuits and their Applications – Assignment 1 Electrical Quantities Task 1 Definitions:- Design a table or a poster for the following quantities. You must clearly ‘define’ each quantity, state its unit and quote relevant equations. Current, potential difference (voltage), charge, resistance, conductance, power and capacitance. As an addition to your table, outline the following: •Ohm’s law •Resistivity and conductivity •Table of good electrical conductors and resistivities •Table of good electrical insulators and resistivities •Kirchhoff’s first and second laws This provides evidence for P1 Task 2 Circuits:- This is a problem-solving task that can lead to a merit award. You will be working independently, but you can use your notes and resources in the lab. Answer all the questions on the task sheet: ‘M1 –Circuits’, You must show all working and have the correct unit for each quantity. You must score 100% for an award of ‘M1’. This provides evidence for M1 Task 3 Analysing electrical relationships and quantities (You are only being assessed on your ‘analysis’) You have already carried some of the experiments below. For each experiment, tabulate your results, plot appropriate graphs and write your conclusions. 1.Carry out an experiment to investigate how the resistance and power dissipated by a filament lamp and a resistor is affected by voltage 2.You are given a 1.000 m long resistance wire. Find how the resistance of the wire is affected by its length. Plot a graph of resistance against length. Use the graph to determine the resistivity of the metal. 3.You are provided with three 1000 F capacitors. Determine the charge-time and current-time graphs for the capacitor discharging through 100 k and 220 k resistors. This provides evidence for D1 Exam board is Pearson ALL ASSIGNMENTS I HAVE UPLOADED ARE DISTINCTION GRADED.
Description: Unit 17: Electrical Circuits and their Applications – Assignment 1 Electrical Quantities Task 1 Definitions:- Design a table or a poster for the following quantities. You must clearly ‘define’ each quantity, state its unit and quote relevant equations. Current, potential difference (voltage), charge, resistance, conductance, power and capacitance. As an addition to your table, outline the following: •Ohm’s law •Resistivity and conductivity •Table of good electrical conductors and resistivities •Table of good electrical insulators and resistivities •Kirchhoff’s first and second laws This provides evidence for P1 Task 2 Circuits:- This is a problem-solving task that can lead to a merit award. You will be working independently, but you can use your notes and resources in the lab. Answer all the questions on the task sheet: ‘M1 –Circuits’, You must show all working and have the correct unit for each quantity. You must score 100% for an award of ‘M1’. This provides evidence for M1 Task 3 Analysing electrical relationships and quantities (You are only being assessed on your ‘analysis’) You have already carried some of the experiments below. For each experiment, tabulate your results, plot appropriate graphs and write your conclusions. 1.Carry out an experiment to investigate how the resistance and power dissipated by a filament lamp and a resistor is affected by voltage 2.You are given a 1.000 m long resistance wire. Find how the resistance of the wire is affected by its length. Plot a graph of resistance against length. Use the graph to determine the resistivity of the metal. 3.You are provided with three 1000 F capacitors. Determine the charge-time and current-time graphs for the capacitor discharging through 100 k and 220 k resistors. This provides evidence for D1 Exam board is Pearson ALL ASSIGNMENTS I HAVE UPLOADED ARE DISTINCTION GRADED.
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Unit 17- Assignment 1- P1
Current
Electric current is the flow of charged particles in a conductor
...
Electron flow is from negative to positive
...
g
...
d
...
V = W/Q
Charge
Charge is measured in coulombs (C )
it has the symbol Q
Q = W/V (work done per unit potential difference)
Resistance
Resistance is at a measure of how difficult it is for a given current, I, to flow due to a p
...
of V
...
Power is measure in watts (W) or kilowatts (KW) or megawatts (MW)
...
d
...
Capacitance is equal to charge per unit p
...
and is measured in farads (F)
...
d
...
This can be rearranges to calculate I or R as follows:
R = V/I
I = V/R
Kirchhoff's laws
Kirchhoff's first law stated that the sum of the electrical currents flowing out a circuit junction is
equal to the sum of the electrical currents flowing into the junction
...
For example:
Kirchhoff's second law stated that the sum of the potential differences around a closed circuit is
equal to the sum of e
...
f
...
in that circuit
...
Unit 17- Assignment 1- M1
Electrical calculations
1
...
Supply a voltage = 5
...
05A
What is the value of R?
Ohm's law V = IR
R = V/I = 6
...
05 = 120Ω
b) What is the conductance of the resistor?
G = I/R
G = 1/120 = 0
...
A heater supply voltage = 230V
Current = 9
...
0 = 2070W
3
...
3 kΩ
I = 1
...
2 * 10-5) * 3
...
22 * 3
...
8 * 10-7W
b) Energy in 60 seconds
...
8 * 10-7 * 60
= 0
...
88 * 10-5J
4
...
C= 1000µF = 1000 * 10-6 F
V = 2
...
9
= 2
...
A) In series
1/CT = 1/C1 + 1/C2
= 1/10 + 1/20 = 1/CT = 2/20 + 1/20 = 3/20
20/3 = 6
...
7µF
B) Capacitors in parallel
CT = C1 + C2 = 10 + 20 = 30µF
7
...
0 * 10-7 * 12) / (3
...
2Ω
Unit 17- Assignment 1- D1
Investigation of a filament lamp
By looking at this graph, I can conclude that as you increase the length of the wire, the resistivity of
the wire increases
...
94/1 = 1
...
27mm
A = 5
...
94 * (5
...
11 * 10-7Ω/m
Charge-time graphs
100k Resistor
By looking at the graph, I can see that as the time increases, the voltage decreases as it is lost
through the 100k resistor
...
220k Resistor
By looking at the graph, I can see that as the time increases, the voltage decreases as it is lost
through the 220k resistor
...
100k Resistor
By looking at the graph, I can see that as the time increases, the voltage decreases as it is lost
through the 100k resistor
...
2
...
4
...
5V intervals
...
d
...
Calculate the resistance (R) of the filament at each step
...
5
1
...
5
2
...
5
3
...
5
4
...
5
5
...
004
0
...
7
0
...
9
1
...
1
1
...
25
1
...
27
1
...
14
2
...
80
3
...
20
3
...
60
3
...
002
0
...
05
1
...
25
3
3
...
8
5
...
6
5
...
0
6
...
35
1
...
5
4
...
30
4
...
425
8
...
75
7
...
5
8
...
5
9
...
5
10
...
5
11
...
5
12
...
55
1
...
65
1
...
8
1
...
9
1
...
05
2
...
52
4
...
85
5
...
15
5
...
30
5
...
50
5
...
70
10
...
00
13
...
45
16
...
57
19
...
47
22
...
87
25
...
A
you increase the p
...
, the current also increases
...
As the temperature increases the resistance is also
increased
...
The gradient reduces as the voltage
increases, therefore the resistivity increases
...
5 / 5 = 0
...
1 = 10
Title: BTEC Applied Science Unit 17 Assignment 1
Description: Unit 17: Electrical Circuits and their Applications – Assignment 1 Electrical Quantities Task 1 Definitions:- Design a table or a poster for the following quantities. You must clearly ‘define’ each quantity, state its unit and quote relevant equations. Current, potential difference (voltage), charge, resistance, conductance, power and capacitance. As an addition to your table, outline the following: •Ohm’s law •Resistivity and conductivity •Table of good electrical conductors and resistivities •Table of good electrical insulators and resistivities •Kirchhoff’s first and second laws This provides evidence for P1 Task 2 Circuits:- This is a problem-solving task that can lead to a merit award. You will be working independently, but you can use your notes and resources in the lab. Answer all the questions on the task sheet: ‘M1 –Circuits’, You must show all working and have the correct unit for each quantity. You must score 100% for an award of ‘M1’. This provides evidence for M1 Task 3 Analysing electrical relationships and quantities (You are only being assessed on your ‘analysis’) You have already carried some of the experiments below. For each experiment, tabulate your results, plot appropriate graphs and write your conclusions. 1.Carry out an experiment to investigate how the resistance and power dissipated by a filament lamp and a resistor is affected by voltage 2.You are given a 1.000 m long resistance wire. Find how the resistance of the wire is affected by its length. Plot a graph of resistance against length. Use the graph to determine the resistivity of the metal. 3.You are provided with three 1000 F capacitors. Determine the charge-time and current-time graphs for the capacitor discharging through 100 k and 220 k resistors. This provides evidence for D1 Exam board is Pearson ALL ASSIGNMENTS I HAVE UPLOADED ARE DISTINCTION GRADED.
Description: Unit 17: Electrical Circuits and their Applications – Assignment 1 Electrical Quantities Task 1 Definitions:- Design a table or a poster for the following quantities. You must clearly ‘define’ each quantity, state its unit and quote relevant equations. Current, potential difference (voltage), charge, resistance, conductance, power and capacitance. As an addition to your table, outline the following: •Ohm’s law •Resistivity and conductivity •Table of good electrical conductors and resistivities •Table of good electrical insulators and resistivities •Kirchhoff’s first and second laws This provides evidence for P1 Task 2 Circuits:- This is a problem-solving task that can lead to a merit award. You will be working independently, but you can use your notes and resources in the lab. Answer all the questions on the task sheet: ‘M1 –Circuits’, You must show all working and have the correct unit for each quantity. You must score 100% for an award of ‘M1’. This provides evidence for M1 Task 3 Analysing electrical relationships and quantities (You are only being assessed on your ‘analysis’) You have already carried some of the experiments below. For each experiment, tabulate your results, plot appropriate graphs and write your conclusions. 1.Carry out an experiment to investigate how the resistance and power dissipated by a filament lamp and a resistor is affected by voltage 2.You are given a 1.000 m long resistance wire. Find how the resistance of the wire is affected by its length. Plot a graph of resistance against length. Use the graph to determine the resistivity of the metal. 3.You are provided with three 1000 F capacitors. Determine the charge-time and current-time graphs for the capacitor discharging through 100 k and 220 k resistors. This provides evidence for D1 Exam board is Pearson ALL ASSIGNMENTS I HAVE UPLOADED ARE DISTINCTION GRADED.