IGCSE A Level Physics MCQs - Chapter 12
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Electronics Test Questions and Answers PDF Download: MCQ 4
A component whose property changes when there is a change in any physical quantity of a device is
- processor
- sensor
- output device
- portable device
Benefits of negative feedback include
- less distortion
- increased bandwidth
- low output resistance
- all of above
When temperature rises, resistance of negative temperature coefficient thermistor
- increases
- decreases
- zero
- infinity
If current of 20 mA is passing through op-amp and voltage drop across series resistor is 10 V then value of resistance is
- 500 Ω
- 400 Ω
- 300 Ω
- 200 Ω
Graph of resistance of thermistor to temperature is
- exponential decrease
- linear decrease
- exponential increase
- linear increase
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