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Vacuum tubes were replaced in modern electrical devices by:

Vacuum tubes were replaced in modern electrical devices by:

04/10/2023 – by freshmcqs

Batteries
Transistor
Insulator
Both A and C

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PPSC New Job Advertisements – Apply by 05 May 2025 Punjab Public Service Commission (PPSC) has announced new job vacancies in multiple departments. These include: – 11 Posts of Sub-Engineer (BS-14) in the Labour & Human Resource Department – 03 Posts of Planning Officer (BS-17) in the Specialized Healthcare & Medical Education Department – 01 Post of Lecturer (Mathematics) (BS-17) in the Inspectorate of Mines, Punjab, Mines & Minerals Department Interested candidates can apply online through the official PPSC website. Last date to apply: 05 May 2025.

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