17 Dec. 2021 Daily Current Affairs Show #07 | Current GK Today ( in Hindi )| by GAURAV Sir | Doubtnut

Daily Current Affairs 11 Feb 2020 | SSC-CGL, RBI, NDA, SBI, IBPS, Railways, UPSC

The core of a toroid having 3000 turns has inner and outer radii of 16 cm and 17 cm respectively . The magnetic field in the core for a current of 0.07 A is 2.5 T . What is relative permeability of the core ?

The figure shows three situations in which identical circular conducting loops are in uniform magnetic fields that are either increasing (Inc) or decreasing (Dec) in magnitude at identical rates. In each, the dashed line coincides with a diameter. Rank the situations according to the magnitude of the current induced in the loops, greatest first.