The Role of Resistors in Electrical Circuits and Ohm's Law

The Role of Resistors in Electrical Circuits and Ohm's Law

Assessment

Interactive Video

Physics, Science, Mathematics

9th - 12th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial explains resistors, their function, and symbols. It uses a water analogy to describe how resistors limit electrical current and introduces Ohm's Law. The tutorial demonstrates Ohm's Law with circuit examples, including an LED circuit. It covers various resistor types, their construction, and the resistor color code for identifying resistance values.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

To store electrical energy

To increase the voltage

To limit the flow of electric current

To convert electrical energy into light

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which analogy is used to explain the function of a resistor?

A car engine

A water flow through a tube

A wind turbine

A solar panel

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

According to Ohm's Law, how is resistance calculated?

Voltage multiplied by current

Voltage plus current

Voltage divided by current

Current divided by voltage

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a simple circuit with a 2-volt source and a desired current of 4 amps, what should the resistance be?

2 ohms

0.5 ohms

4 ohms

8 ohms

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is a resistor used in an LED circuit?

To change the color of the LED

To increase the brightness of the LED

To prevent the LED from burning out by limiting current

To store energy for the LED

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a potentiometer used for?

To adjust voltage in a circuit

To store electrical energy

To measure temperature

To convert AC to DC

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which type of resistor is adjusted by mechanical movement?

Fixed resistor

Digital potentiometer

Variable resistor

Wire wound resistor

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