Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing

Search...

12 Questions

0 Views

Electricity: Ohm's Law Definition

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What does Ohm's law state?

Resistance in a conductor is inversely proportional to the current

Current in a conductor is inversely proportional to the potential difference

Current in a conductor is directly proportional to the potential difference (correct)

Potential difference in a conductor is directly proportional to the resistance

How is Ohm's law mathematically expressed?

$P = rac{I}{R}$

$V = rac{I}{R}$

$V = IR$ (correct)

$P = IV$

What is the unit of resistance?

Farad

Watt

Henry

Ohm (correct)

What happens to the current if the potential difference across a conductor is halved?

The current halves Signup and view all the answers

What are the two main limitations of Ohm's law?

Temperature and resistance Signup and view all the answers

What happens to the ratio V/I when temperature is not kept constant?

It remains constant Signup and view all the answers

What happens to resistance as the temperature of a conductor increases?

It increases Signup and view all the answers

Which of the following is NOT a physical condition of a conductor affecting its resistance?

Amount of charge passing through it Signup and view all the answers

Why does the V-I graph for a non-ohmic resistor not form a straight line?

Due to internal resistance Signup and view all the answers

Which unit is used to measure potential difference?

Volt Signup and view all the answers

In an electric circuit, why is the potential difference across the cell terminals higher when the cell is not in use?

Internal resistance of the cell Signup and view all the answers

What happens to the terminal voltage when no current is drawn from a cell?

It is equal to e.m.f. Signup and view all the answers