Resistor and Variable Resistor Quiz

What does the first color band on a resistor indicate?

• The second digit in the resistance value

• The number of zeros to add

• The first digit in the resistance value

• The tolerance percentage

Which color band on a resistor can be gold or silver?

• Fourth band

• First band

• Second band

• Third band

What happens if the third band on a resistor is gold?

• The first two digits are multiplied by 10%

• The resistance value is halved

• The first two digits are multiplied by 1%

• The resistance value is doubled

What is the purpose of the fourth color band on a resistor?

• To indicate the first digit

• To indicate the second digit

• To indicate the tolerance percentage

• To indicate the number of zeros

What is a rheostat primarily used for?

• To vary current in a circuit

• To measure resistance

• To connect multiple resistors

• To vary voltage in a circuit

What type of device is a potentiometer?

• A two-terminal device

• A three-terminal device

• A variable capacitor

• A four-terminal device

What does the wiper in a potentiometer do?

• Connects to the power source

• Acts as a fixed resistor

• Varies the resistance between terminals

• Measures the voltage

In a linear potentiometer, how does resistance change?

• It varies randomly

• It varies linearly with the wiper position

• It changes exponentially

• It remains constant

What is a thermistor?

• A type of capacitor

• A type of fixed resistor

• A variable resistor that is temperature sensitive

• A device that measures current

What happens to the resistance of a thermistor as temperature increases?

• It fluctuates

• It increases

• It decreases

• It remains the same