Current potential difference graphs

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Current potential difference graphs

Last updated: 13/03/2020

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Current
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Question 1 of 22

1. Question
What happens to an LDR when light intensity increases?
- Resistance decreases
- Resistance stays the same
- Resistance increases
- Resistance goes to infinity
Correct

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Question 2 of 22

2. Question
What happens to an LDR when light intensity decreases?
- Resistance increases
- Resistance goes to infinity
- Resistance stays the same
- Resistance decreases
Correct

Incorrect
Question 3 of 22

3. Question
What is a current voltage graph?
- A graph with current on the y-axis, voltage on the x-axis
- A graph with resistance and voltage
- A graph with current on the x-axis, voltage on the y-axis
- A graph with resistance and current
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Question 4 of 22

4. Question
What are LDRs used for?
- Outdoor lighting
- Thermostats
- Rechargeable batteries
- Circuit protectors
Correct

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Question 5 of 22

5. Question
What does the INVERSE gradient of a current/voltage graph represent?
- Resistance
- Current
- Voltage
- Temperature
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Question 6 of 22

6. Question
How do we test the resistance of a component?
- We create a circuit with an ammeter and voltmeter
- We create a circuit with just the component in
- We set up a circuit with no power supply
- We set up a circuit with an ammeter only
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Question 7 of 22

7. Question
Is resistance constant for resistors?
- It can be constant or change as current changes
- It is constant
- It changes as current changes
- It always changes
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Question 8 of 22

8. Question
How is an ammeter connected?
- In series
- In parallel
- Next to the battery
- Around the component
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Question 9 of 22

9. Question
A straight diagonal line on an I-V graph represents what?
- Constant resistance
- Changing resistance
- No resistance
- A change in temperature
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Question 10 of 22

10. Question
How is a voltmeter connected?
- In parallel
- In series
- In series or parallel
- Next to the component
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Question 11 of 22

11. Question
What type of conductor produces a straight diagonal line on an I-V graph?
- An Ohmic conductor
- An insulator
- A conductor
- A heating component
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Question 12 of 22

12. Question
What would you use to change the temperature of the thermistor in an experiment?
- Place it in a regulated water bath
- Place it next to a radiator
- Place it on a stove
- Use a kettle
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Question 13 of 22

13. Question
What does Ohmic conductor mean?
- Current is directly proportional to voltage, so resistance is constant
- Resistance is constantly changing
- Current is directly proportional to voltage, so resistance changes
- Current and voltage never change, so resistance never changes
Correct

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Question 14 of 22

14. Question
How woud you conduct an experiment with an LDR?
- Shine a torch at it and move it back by 5cm for each measurement
- Place it in front of a light
- Place it in a dark room
- Cover it up
Correct

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Question 15 of 22

15. Question
If resistor A has an I-V line above resistor B, which has the highest resistance?
- Resistor B
- Resistor A
- Both the same resistance
- No resistance
Correct

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Question 16 of 22

16. Question
If resistor A has an I-V line below resistor B, which has the highest resistance?
- Resistor A
- Both the same resistance
- No resistance
- Resistor B
Correct

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Question 17 of 22

17. Question
Why does the resistance of a filament lamp increase?
- The temperature of the filament increases
- Current stays the same
- The temperature of the filament decreases
- Voltage stays the same as current increases
Correct

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Question 18 of 22

18. Question
Why does the I-V graph of a diode have a flat line on the negative V-axis?
- Diodes only let current pass through in one direction
- Resistance is 0 here
- Diodes let current flow in both directions
- Negative voltages cannot exist
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Question 19 of 22

19. Question
What is the resistance of a diode for negative voltage values?
- Very high – infinite
- Very low
- Almost 0
- Around 1
Correct

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Question 20 of 22

20. Question
What happens to a thermistor as temperature increases?
- Resistance decreases
- Resistance stays the same
- Resistance increases
- Resistance goes to infinity
Correct

Incorrect
Question 21 of 22

21. Question
What are thermistors used for?
- All of these answers
- Circuit protectors
- Thermostats
- Rechargeable batteries
Correct

Incorrect
Question 22 of 22

22. Question
What is an LDR?
- Light Dependent Resistor
- Light Depence Resistor
- Light Dependent Resistance
- Long Distance Relationship
Correct

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