Sir mera question ye h ki kuch aise substance jaise ki wire carrying electric current, steel structure, railroad rails, underground iron pipes inhe hataya nhi jaa skta inke hote hue kuch to error aayenge hi magnetic needle puri trh s north pole pr point nhi hogi jisse ki kuch error aa jayega to iss error ko kaise khtm kiya jaa skta h.
Brother uss case me hume local attractions ko eliminate karna padega Actually local attraction doe not include the things which are avoidable. Aap neeche diye hue video ki help le sakte ho, aapko sab samajh aa jayega. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-C4QWdpnABdo.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE--MQ6gRI_WQU.html
Sir ji fer yeh keys or metal buttons yah fer chain steel tapes nhi lekhengeee aapne video ke end mai bola hai yeh include nhi hote bsss Etna bta doo jb sources puche exam mai tb yeh point lekhne hai yah nhi likhne