Resistor Knowledge

What is the purpose of a resistor in an electrical circuit?

• To limit the flow of electric current

• To generate electric current.

• To store electric charge.

• To increase the flow of electric current.

Arjun, David, and Isla are working on a project in their electronics class where they need to use resistors. They are confused about the color coding on the resistors. Can you tell them what the four bands used in resistor color coding represent?

• First digit, second digit, third digit, and tolerance.

• First significant digit, second significant digit, multiplier, and tolerance

• Resistance, capacitance, inductance, and tolerance.

• Red, green, blue, and yellow.

What is the formula for calculating resistance using Ohm's law?

• R = V/I

• R = V * I

• R = I/V

• R = V + I

Oliver, Henry, and Anika are working on a science project. They need to measure the resistance of a circuit they have built. Which unit should they use to measure the resistance?

• ampere

• volt

• watt

• ohm

Olivia is working on a science project involving resistors. She comes across a term 'tolerance' related to resistors. What does the tolerance of a resistor mean in this context?

• The tolerance of a resistor is a measure of its temperature coefficient.

• The tolerance of a resistor is a measure of its physical size.

• The tolerance of a resistor is a measure of how much the actual resistance of the resistor can deviate from its stated value.

• The tolerance of a resistor is a measure of its power rating.

Abigail, Aiden, and Isla are working on a school project about electronics. They are discussing the different types of resistors based on their construction. Can you help them identify the correct types?

• carbon composition resistors, carbon film resistors, metal film resistors, metal oxide film resistors, wirewound resistors, and thick film resistors

• thick wire resistors, carbon film resistors, metal oxide resistors

• wire resistors, carbon resistors, metal resistors

• ceramic resistors, film resistors, variable resistors

What is the difference between a fixed resistor and a variable resistor?

• A fixed resistor is used in AC circuits, while a variable resistor is used in DC circuits.

• A fixed resistor is smaller in size compared to a variable resistor.

• A fixed resistor has a higher power rating than a variable resistor.

• A fixed resistor has a constant resistance value, while a variable resistor allows the resistance value to be adjusted.

Michael is working on a science project involving a simple electric circuit. He uses a carbon composition resistor in his project. What is the purpose of this resistor in Michael's project?

• To limit the flow of electric current in his circuit.

• To increase the flow of electric current in his circuit.

• To measure the voltage in his circuit.

• To store electric charge in his circuit.

Zoe, Luna, and Noah are working on a science project involving a circuit. They have a wirewound resistor at their disposal. What would be the purpose of this resistor in their project?

• The purpose of the wirewound resistor in their project would be to provide resistance and control the flow of electric current in the circuit.

• The purpose of the wirewound resistor in their project would be to store electrical energy in the circuit.

• The purpose of the wirewound resistor in their project would be to reduce the voltage in the circuit.

• The purpose of the wirewound resistor in their project would be to amplify the electric current in the circuit.

Daniel is working on a science project about different electronic components. He came across a component called a thermistor. Can you help Ethan and Nora understand what is the purpose of a thermistor?

• The purpose of a thermistor is to measure and control humidity.

• The purpose of a thermistor is to measure and control temperature.

• The purpose of a thermistor is to measure and control pressure.

• The purpose of a thermistor is to measure and control voltage.