Understanding Resistor Colour Codes

What is the primary function of a voltage dependent resistor (VDR)?

• To maintain a constant voltage across a circuit

• To change resistance with varying voltage

• To store electrical energy

• To convert AC to DC

Which colour code represents a 10kΩ resistor?

• Brown, Black, Orange

• Red, Red, Red

• Brown, Black, Red

• Orange, Orange, Brown

How does the resistance of a PTC thermistor typically change with an increase in temperature?

• It remains constant

• It increases

• It decreases

• It fluctuates randomly

What is the unit of resistance?

• Ampere

• Volt

• Ohm

• Watt

Which of the following is a common application of a voltage dependent resistor?

• Voltage regulation in power supplies

• Temperature sensing

• Protection from Over Voltage

• Current amplification

What is the colour code for a 470Ω resistor?

• Yellow, Violet, Brown

• Green, Blue, Brown

• Red, Red, Brown

• Orange, Orange, Brown

In a voltage dependent resistor, what happens to the resistance when the voltage increases?

• Resistance increases

• Resistance decreases

• Resistance remains constant

• Resistance becomes zero

What is the typical behaviour of a thermistor in a circuit?

• It acts as a constant resistor

• It changes resistance with temperature

• It stores charge

• It converts AC to DC

Which of the following is NOT a factor affecting the resistance of a resistor?

• Material

• Length

• Voltage

• Cross-sectional area

What is the colour code for a 1kΩ resistor?

• Brown, Black, Red

• Red, Red, Brown

• Brown, Black, Orange

• Orange, Orange, Brown