Created by StemPy LabA flat circular coil of radius carries a current of . The magnetic field at its centre is measured to be . Taking , the number of turns in the coil is ____.
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← A lead bullet travelling at 300 m/s hits a thick steel plate and comes to a stop inside a dent in it. Half of the bullet's kinetic energy turns into heat that stays in the bullet; the rest goes into the plate and into sound. The specific heat of lead is 125 J kg⁻¹ K⁻¹. The rise in the temperature of the bullet, in kelvin, is ____.Two plane mirrors are placed with their reflecting faces at 45° to each other, with their edges touching. A small object is placed between them, away from the line where they meet. The number of images formed is ____. →
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