Themistors and LDR

Which one is the symbol for 'thermistor'?

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• 
• 
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Which statement about this device is true?

• Its resistance is dependent on the temperature of the surroundings

• Its resistance is dependent on light intensity

• It only allows current to flow through it in one direction

• The wire inside it gets hot and melts if too much current flows through it

Which statement about this device is true?

• Its resistance is dependent on the temperature of the surroundings

• Its resistance is dependent on light intensity

• It only allows current to flow through it in one direction

• The wire inside it gets hot and melts if too much current flows through it

Which statement about this device is true?

• Its resistance increases as temperature increases

• Its resistance decreases as temperature increases

• Its resistance increases as light intensity increases

• Its resistance decreases as light intensity increases

What is the effective resistance of this circuit?

• 100Ω

• 200Ω

• 300Ω

• 400Ω

What is the total resistance in this circuit?

• 600 Ω

• 600 kΩ

• 6 MΩ

• 6 kΩ

What is the effective resistance of this combination?

• 2 kΩ

• 1 kΩ

• 5 kΩ

• 500 Ω

This is a graph for which component?

• LDR

• Thermistor

• Diode

• Resistor

• Filament lamp

When temperature decreases, then the output voltage

• Increases

• Decreases

• Stay the same

During night, the output voltage is

• Low

• High