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WorksheetsBWS AQA Physics Electricity IV characteristics
Total questions: 15
Worksheet time: 9mins
The graph shows the change in current with potential difference for
an LED
a filament lamp
a diode
a thermistor
To calculate the resistance of the component at a particular potential difference you
read the current at that point on the graph and calculate p.d divided by current
draw a tangent to the line at that point and calculate the gradient
draw a tangent to the line at that point and calculate 1/gradient
read the current at that point on the graph and calculate current/p.d
The resistance of the component
is always constant as the p.d. increases
starts high and then decreases as the p.d. increases
starts constant for low values of p.d. and then increases as the p.d. increases
starts constant for low values of p.d. and then decreases as the p.d. increases
Which component has the highest resistance?
1
2
The components 1 and 2 which produced this IV graph are:
Resistors
Filament lamps
Diodes
A combination of the above
To calculate the resistance of component 1
Calculate the gradient of the line
Calculate the gradient of line 1 and line 2 and find the difference between them.
Calculate the area under the graph
Calculate 1/gradient of the line
Where would you place an ammeter in the circuit?
Green ?
Red ?
Where would you place a voltmeter in the circuit?
Green ?
Red ?
What is the relationship between the readings on Ammeters A1, A2 and A3
A1 = A2 + A3
A3 = A1 + A2
A1 = A2 = A3
A3 = A1-A2
What is the relationship between the readings on Ammeters A1, A2 and A3?
A1 = A2 = A3
A1 = A2 - A3
A3 = A1 + A2
A3 = A1 - A2
This is an example of a _________ circuit
series
parallel
The reading on Voltmeter V1 is
15V
6V
9V
12V
The reading on Voltmeter V2 is
15V
6V
9V
3V
The reading on the voltmeter is
3 V
6 V
12 V
Can not answer as need to know the resistance of the bulb.
Which of the following statements is true?
V1 + V2 + V3 is equivalent to the emf of the cell
V1 + V2 - V3 is equivalent to the emf of the cell
V2 = V3
V1 = V3
