current chapter 3 class 12 objective dpp2
please comments your answer for matching NEXT TOPPER INSTITUTE हम आपके सपनो को साकार करेंगे 1. A wire of length 6 m and area of cross section 1 m m 2 carries a current of 2 A. if unit cubic meter of the material of a wire contains 10 29 free electrons ,find the average time taken by an electron to cross the length of wire . 16 hr b. 13.33 hr c. 14.44 hr d. 17 hr 2. The number of density of electrons in coppers is 8.5 x 10 28 m -3 . What is the time taken by an electron to drift from one end of the wire 2.2 m long to its other end if area of cross section of the wire is 2.0 x 10 -6 m 2 and it is carryin...