Variable Resistors Mastery Quiz

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Test your knowledge on variable resistorsand their use in circuits.

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amani

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Variable Resistors Mastery Quiz


Variable Resistors Mastery QuizVersión en línea Test your knowledge on variable resistorsand their use in circuits. por amani 1 What is a potentiometer primarily used for in circuits? a To convert AC to DC b To store electrical charge c To measure resistance only d To vary output voltage or current 2 What are common types of potentiometers? a Thermionic and piezoelectric b Electromagnetic and acoustic c Rotary and linear potentiometers d Digital and analog switches 3 In a circuit, a potentiometer often acts as what type of device? a A current source b A voltage divider c A power transformer d A current limiter 4 How does increasing the resistance of a potentiometer in a fixed circuit affect current? a Voltage across load stays the same b Total current increases c Total current decreases d Power increases 5 Which part of a potentiometer is moved to vary resistance? a The case b The wiper c The body d The terminals 6 Which statement is true about using a potentiometer as a light dimmer? a It short-circuits the supply b It converts light to electrical energy c It acts as a fixed resistor d It provides gradual resistance change to vary light 7 What is a potentiometer? a A fixed resistor with four terminals b A fixed resistor with two terminals c A three-terminal variable resistor d A single-turn coil resistor 8 What does an LDR do? a It stores electrical energy b Its resistance changes with light level c It produces light d It amplifies current 9 What are the two main thermistor types? a Photodiode and LED b NPN and PNP c Zener and LED d NTC and PTC 10 How does an NTC thermistor respond to temperature? a It stops conducting after heating b Resistance decreases as temperature rises c Resistance increases as temperature rises d Resistance stays the same when temp rises 11 Which condition causes LDR resistance to decrease? a Increase in temperature b Applying a higher voltage across it c Increase in darkness d Increase in light intensity 12 Which applications relate to thermistors and LDRs? a Heavy industrial welding b Water heaters, street lighting & energy saving c Radio transmitters only d High-power motors only

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Variable Resistors Mastery Quiz

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Variable Resistors Mastery QuizVersión en línea

por amani

What is a potentiometer primarily used for in circuits?

What are common types of potentiometers?

In a circuit, a potentiometer often acts as what type of device?

How does increasing the resistance of a potentiometer in a fixed circuit affect current?

Which part of a potentiometer is moved to vary resistance?

Which statement is true about using a potentiometer as a light dimmer?

What is a potentiometer?

What does an LDR do?

What are the two main thermistor types?

How does an NTC thermistor respond to temperature?

Which condition causes LDR resistance to decrease?

Which applications relate to thermistors and LDRs?