The magnetic field at a distance ‘r’ from a long wire carrying current ‘i’ is 0.4 tesla. The magnetic field at a distance ‘2r’ is August 11, 2020 Category: Chapter 23 - Magnetic Effects of Current and Moving Charges , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Physics , Facebook Messenger WhatsApp Share this:TwitterFacebook Related