Understanding Resistors

What is the primary function of a resistor in a circuit?

• To increase the voltage

• To limit the current

• To decrease the voltage

• To store electrical energy

How does a resistor protect an LED?

• By storing electrical energy

• By acting as a capacitor

• By reducing the current

• By increasing the voltage

Which type of resistor is made by mixing carbon or graphite with an insulating powder?

• Wire wound resistor

• Carbon composite resistor

• Metal film resistor

• Surface mount resistor

What is the main advantage of metal film resistors over carbon film resistors?

• Larger size

• Higher tolerance and stability

• Lower cost

• Easier to produce

How is the resistance value indicated on a carbon film resistor?

• By the size of the resistor

• By a number on the side

• By colored stripes

• By the material used

What does the third stripe on a four-band resistor represent?

• The second digit

• The multiplier

• The tolerance

• The first digit

What is a potentiometer used for?

• To store electrical energy

• To measure voltage

• To adjust resistance manually

• To increase current

Which type of resistor automatically adjusts its resistance based on temperature?

• Varistor

• Thermistor

• Light-dependent resistor

• Wire wound resistor

What is the primary use of wire wound resistors?

• For storing electrical energy

• For measuring voltage

• For low power applications

• For high power and current ratings

What does the letter 'R' signify in the coding of surface mount resistors?

• The tolerance

• The resistance value

• A decimal place

• The power rating