when was vacuum tube invented

My Examsbook
Saved Articles
Login
Question Bank
- Question Bank
- Question Bank
- Current Affairs
  - Current Affairs
  - Current Affairs
- General Knowledge
  - General Knowledge
  - General Knowledge
- Aptitude Questions
  - Aptitude Questions
  - Aptitude Questions
- Reasoning Ability
  - Reasoning Ability
  - Reasoning Ability
- English Comprehensive
  - English Comprehensive
  - English Comprehensive
- General Awareness
  - General Awareness
  - General Awareness
- Quantitative Aptitude
  - Quantitative Aptitude
  - Quantitative Aptitude
- Computer Questions
  - Computer Questions
  - Computer Questions
Test Series NEW
GK
- GK
- GK
- Current GK
  - Current GK
  - Current GK
- Indian History
  - Indian History
  - Indian History
- World History
  - World History
  - World History
- Indian Geography
  - Indian Geography
  - Indian Geography
- World Geography
  - World Geography
  - World Geography
- Indian Economy
  - Indian Economy
  - Indian Economy
- Indian Polity
  - Indian Polity
  - Indian Polity
- Indian Constitution
  - Indian Constitution
  - Indian Constitution
- Indian Art and Culture
  - Indian Art and Culture
  - Indian Art and Culture
- General Science
  - General Science
  - General Science
- Sports
  - Sports
  - Sports
- Inventions
  - Inventions
  - Inventions
- Indian Railway
  - Indian Railway
  - Indian Railway
- Basic GK
  - Basic GK
  - Basic GK
- Rajasthan GK
  - Rajasthan GK
  - Rajasthan GK
Reasoning
- Reasoning
- Reasoning
- Non Verbal Reasoning
  - Non Verbal Reasoning
  - Non Verbal Reasoning
- Logical Reasoning
  - Logical Reasoning
  - Logical Reasoning
- Verbal Reasoning
  - Verbal Reasoning
  - Verbal Reasoning
Maths
- Maths
- Maths
- Quantitative Abilities
  - Quantitative Abilities
  - Quantitative Abilities
- Aptitude
  - Aptitude
  - Aptitude
English
Practice
- Practice
- Practice
- Arithmetic Ability
  - Arithmetic Ability
  - Arithmetic Ability
- Quantitative Aptitude
  - Quantitative Aptitude
  - Quantitative Aptitude
- Bank Exams Questions
  - Bank Exams Questions
  - Bank Exams Questions
- Computer awareness questions
  - Computer awareness questions
  - Computer awareness questions
- Verbal Reasoning
  - Verbal Reasoning
  - Verbal Reasoning
- General English
  - General English
  - General English
Exams
- Exams
- Exams NEW
- SSC
- Bank Exams
  - Bank Exams
  - Bank Exams
  - Computer Awareness
  - Banking Questions
  - SBI
  - IBPS PO
  - IBPS Clerk
  - IBPS RRB
  - SBI PO
  - SBI Clerk
  - SBI SCO
- RRB(Railway)
  - RRB(Railway)
  - RRB(Railway)
  - RRB Group D
  - RRB (NTPC)
  - RRB JE
- Rajasthan Exams
  - Rajasthan Exams
  - Rajasthan Exams
  - LDC
  - Patwari
  - Gram Sevak
  - Rajasthan Police
  - Rajasthan Home Guard
  - CET
  - CTET
- Defence Exam
  - Defence Exam
  - Defence Exam
Logout

Join Examsbook

480 0

Q:
When was vacuum tube invented?

1
1900
2
1910
3
1880
4
1906

Show AnswerHide Answer
Workspace

Answer : 4. " 1906 "

Previous Next

GK Computer GK Questions

Q:
When was vacuum tube invented?

Answer : 4. " 1906 "

Taxonomies

Are you sure

Report Error

when-was-vacuum-tube-invented

Q: When was vacuum tube invented?

Answer : 4. " 1906 "

Similar Questions

Q. Which Indian state has the least literacy rate?

Q. Which language is spoken in Karnataka?

Q. 6 months day and 6 months night - Country Name?

Q. What is the chief source of political power in India?

Q. Which one of the following plants is popularly grown along the road for absorbing vehicular pollutants?

Taxonomies

Are you sure

Report Error

when-was-vacuum-tube-invented

Q:
When was vacuum tube invented?

Q.
Which Indian state has the least literacy rate?

Q.
Which language is spoken in Karnataka?

Q.
What is the chief source of political power in India?

Q.
Which one of the following plants is popularly grown along the road for absorbing vehicular pollutants?