Current Electricity Quiz

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson
Download our mobile app to listen on the go
Get App

Questions and Answers

What characterizes non-ohmic materials in terms of voltage and current relationship?

  • Their resistance varies with voltage and temperature. (correct)
  • They maintain a constant resistance regardless of temperature.
  • They only function at elevated temperatures.
  • They exhibit a linear voltage relationship.

How does the resistance of a filament lamp change as it gets hotter?

  • The resistance decreases.
  • The resistance first decreases, then increases.
  • The resistance remains constant.
  • The resistance increases. (correct)

What is the behavior of a thermistor when exposed to increased temperature?

  • Its conductivity stays unaffected by temperature.
  • Its resistance increases due to thermal expansion.
  • Its resistance decreases due to increased electron availability. (correct)
  • It becomes an insulator as temperature rises.

Which of the following statements about non-ohmic materials is true?

<p>Their voltage-current relationship can change with temperature. (C)</p> Signup and view all the answers

In the context of current conduction, what distinguishes a thermistor from a filament lamp?

<p>A thermistor's resistance decreases with temperature, while a filament lamp's increases. (C)</p> Signup and view all the answers

Flashcards

Non-ohmic material

A material that does not follow Ohm's law, meaning its resistance changes with voltage.

Filament lamp resistance

The resistance of a filament lamp increases as the temperature increases.

Thermistor

A heat-sensitive resistor whose resistance decreases as the temperature increases.

Thermistor resistance change

The resistance of a thermistor decreases as the temperature rises.

Signup and view all the flashcards

Ohm's law relationship

The relationship where voltage and current in a circuit are directly proportional if the resistance stays the same.

Signup and view all the flashcards

Study Notes

Current Electricity

  • Non-ohmic materials exhibit a non-linear voltage relationship.
  • Filament lamps and thermistors are examples of non-ohmic materials.
  • Filament resistance increases as the filament gets hotter.
  • A thermistor's resistance decreases as it gets hotter.
  • As thermistors heat up, more free electrons become available, leading to increased current flow.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

More Like This

Use Quizgecko on...
Open
Browser
Browser