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Worksheetsyear 9 IV characteristics
Total questions: 25
Worksheet time: 12mins
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
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
This is an example of a _________ circuit
series
parallel
The reading on Voltmeter V1 is
15V
6V
9V
12V
which component produces an IV graph like this?
resistor
diode
filament bulb
fuse
which component produces an IV graph like this?
resistor
diode
filament bulb
fuse
Link the component being tested with the graph of results expected
Which graph represents an ohmic conductor?
Link the component being tested with the graph of results expected
Which one is the symbol for 'thermistor'?
Which one is the symbol for 'light dependent resistor'?
The resistance of a thermistor increases when its temperature increases
TRUE
FALSE
The resistance of a light dependent resistor increases when the light intensity decreases
TRUE
FALSE
This is the symbol for a
Light dependent resistor
Thermistor
Diode
Fuse
This is a graph for which component?
LDR
Thermistor
Diode
Resistor
Filament lamp
This is a graph for which component?
LDR
Thermistor
Diode
Resistor
Filament lamp
At high temperatures, the resistance is .....
High
Low
At low temperatures, the resistance is ...
High
Low
When the light intensity is high (e.g. during the day), the resistance is ...
high
low
When the light intensity is low (e.g. at night), the resistance is ...
high
low
