WorksheetsUnderstanding Resistor Colour Codes
Total questions: 15
Worksheet time: 8mins
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
What is the primary characteristic of a voltage dependent resistor?
It has a fixed resistance
Its resistance changes with voltage
It stores electrical energy
It converts electrical energy to heat
Which of the following is a typical use of thermistors?
Voltage regulation
Temperature measurement
Current amplification
Signal modulation
What is the colour code for a 220Ω resistor?
Red, Red, Brown
Red, Black, Brown
Brown, Black, Red
Orange, Orange, Brown
How does a voltage dependent resistor protect a circuit?
By maintaining a constant current
By increasing resistance at high voltages
By decreasing resistance at high voltages
By storing excess voltage
What is the effect of increasing voltage on a voltage dependent resistor?
It increases the resistance
It decreases the resistance
It has no effect on the resistance
It causes the resistor to fail
