Resistor Quiz

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

• To amplify voltage

• To store electrical charge

• To oppose the flow of current

• To generate electricity

The unit of resistance is the:

• Ampere (A)

• Volt (V)

• Ohm (Ω)

• Watt (W)

What does a higher resistance value indicate?

• Lower opposition to current flow

• Higher opposition to current flow

• No effect on current flow

• Increased voltage

Which type of resistor has a resistance value that changes with temperature?

• Fixed resistor

• Variable resistor

• Thermistor

• Photoresistor

What is the purpose of color bands on a resistor?

• To indicate the material of the resistor

• To indicate the power rating of the resistor

• To indicate the resistance value and tolerance

• To indicate the voltage rating of the resistor

Ohm's Law states that:

• Voltage = Current / Resistance

• Current = Voltage x Resistance

• Voltage = Current x Resistance

• Resistance = Voltage x Current

If a resistor has a voltage of 12V across it and a current of 2A flowing through it, what is its resistance?

• 6 Ω

• 24 Ω

• 0.167 Ω

• 10 Ω

A 100 Ω resistor is connected to a 5V power supply. What is the current flowing through the resistor?

• 0.05 A

• 20 A

• 500 A

• 0.5 A

If a circuit has a current of 0.5A and a resistance of 20 Ω, what is the voltage across the resistor?

• 10 V

• 40 V

• 0.025 V

• 100 V

Two resistors, 10Ω and 20Ω, are connected in series. What is the total resistance?

• 15Ω

• 30Ω

• 6.67Ω

• 200Ω