engineering recuitment DRDO Technician A 2022 Mock Test Series (Tier I) Electronic Mechanic Measuring Instruments Cathode Ray Oscilloscope

एक दोलनदर्शी का केंद्र क्या होता है?

1
बिजली की आपूर्ति
2
सी.आर.टी.
3
लंबवत प्रवर्धक
4
क्षैतिज प्रवर्धक
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