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...

10 Questions

0 Views

Phototransistors

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 is the equation for the collector current in a phototransistor?

$I_c = \frac{I_{co}}{1+\beta}$

$I_c = (1+\beta)I_{co}$ (correct)

$I_c = I_{co} - \beta$

$I_c = I_{co} + \beta$

What controls the current flow between the emitter and collector in a phototransistor?

Light sensitive collector-base p-n junction (correct)

Emitter current

Emitter-collector voltage

Base current

What is the function of the base in a phototransistor?

Produce and control base current by light

Generate voltage for the circuit

Amplify the collector current

Control the larger emitter-collector current (correct)

What happens to the collector current as light intensity increases?

Increases Signup and view all the answers

What is the role of the phototransistor's base when the transistor is switched off?

Small collector can emit leakage current Signup and view all the answers

What is the function of the base in a phototransistor?

It is responsible for producing and controlling the base current by light Signup and view all the answers

What is the equation for the collector current in a phototransistor?

$I_c=(1+\beta)I_{co}$ Signup and view all the answers

What happens to the collector current as light intensity increases?

It increases Signup and view all the answers

What controls the current flow between the emitter and collector in a phototransistor?

The base Signup and view all the answers

What is the role of the phototransistor's base when the transistor is switched off?

It can emit leakage current Signup and view all the answers

Phototransistors

Choose a study mode

Podcast

Questions and Answers

What is the equation for the collector current in a phototransistor?

What controls the current flow between the emitter and collector in a phototransistor?

What is the function of the base in a phototransistor?

What happens to the collector current as light intensity increases?

What is the role of the phototransistor's base when the transistor is switched off?

What is the function of the base in a phototransistor?

What is the equation for the collector current in a phototransistor?

What happens to the collector current as light intensity increases?

What controls the current flow between the emitter and collector in a phototransistor?

What is the role of the phototransistor's base when the transistor is switched off?

More Like This

Shed Light on Your Knowledge of Phototransistors

Phototransistors Quiz

Phototransistor Principles Quiz

Upgrade to continue