`62.0 সেমি` দৈর্ঘ্য এবং `13.0 g` ভরের একটি তারকে এক জোড়া নমনীয় সীসা দ্বারা সাসপেন্ড করা হয়

A wire of 62.0 cm length and 13.0 g mass is suspended by a pair of flexible leads in a uniform magnetic field of magnitude 0.440 T in figure. What are the magnitude and direction of the current required to remove the tension in the supporting leads? Take g = 10 m/s^2

One third of a cylinder of 3 m height is filled with oil of density 0.62 g cm ""^(-3) . and the rest of it is filled with mercury of density 13.6 g cm ""^(-3) . Calculate the total pressure at the bottom of cylinder due to both oil and mercury.