चुम्बकीय डिस्क पर किस पदार्थ की परत होती है  - Study24x7
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Vinayak vyas
21 Mar 2020 11:16 AM study24x7 study24x7

चुम्बकीय डिस्क पर किस पदार्थ की परत होती है 

A

आयरन ऑक्साइड

B

 सोडियम पेरोक्साइड

C

 मैग्नीशियम ऑक्साइड

D

इनमें से कोई नहीं

Railways
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