GAT Subject
Engineering
Computer Science Civil Engineering Chemical Engineering Agricultural Engineering Mechanical Engineering Electronics and Communication
Inventions Section - 1 :: Discussion
| 25. | In which decade were the first successful diode and triode vacuum tubes invented? | |
| A. | 1800s | |
| B. | 1880s | |
| C. | 1890s | |
| D. | 1900s | |
Comments are not available
Post your comments here:
Quick Links
GAT Subject
Computer Science English Mcqs Agriculture
Engineering
Computer Science Civil Engineering
Technical
Networking Electronics Database
Past Papers
Model Papers FPSC Papers