16 Dec. 2021 Daily Current Affairs Show #06 | Current GK Today ( in Hindi )| by GAURAV Sir | Doubtnut

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

A long wire carries a current of uniform density. Let i be the total current carried by the wire. Show that the magnetic energy per unit length stored within the wire equals (mu_(0)t^(2))/(16pi) . Note that it does not depend on the wire diameter.

A galvanometer of resistance 16 ohm shows full scale deflection for a current of 4 mA. How will you convert it into a voltmeter to measure voltage up to 3 V?

The diameter of a circular coil is 0.16m and it has 100 turns. If a current of 5 ampere is passed through the coil, then the intensity of magnetic field at a point on the axis at a distance 0.06 m from its centre will be -

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.