A flat circular coil of 1200 turns and of mean radius 8.0 mm is connected to an ammeter of negligible resistance. The coil has a resistance of 6.3 2. The plane of the coil is placed at right angles to a magnetic field of flux density 0.15 T from a solenoid. The current in the solenoid is switched off. It takes 20 ms for the magnetic field to decrease from its maximum value to zero. Calculate: a the average magnitude of the induced e.m.f. across the ends of the coil b the average current measured by the ammeter. uniform magnetic field from solenoid (out of plane of paper) A coil with 1200 turns 8.0mm

с A 50-turn coil has diameter of 19 cm. The coil is placed in a spatially uniform magnetic field of magnitude 0.75 T so that the face of the coil and the magnetic field are perpendicular. Find the magnitude of the voltage induced in the coil if the magnetic field is reduced to zero uniformly in (a) 0.10 s, (b) 1.0 s, and (c) 60 s. Hint a. Induced voltage is b. Induced voltage is c. Induced voltage is Submit Question 4 % V as magnetic field is reduced to zero in 0.10 s. V as magnetic field is reduced to zero in 1.0 s. V as magnetic field is reduced to zero in 60 s. Search or type URL 5 MacBook Pro 6 & 7 * 8 9

A circular wire coil with 12 turns and radius 3.92 cm is placed in a uniform magnetic field of strength 6.07 T, directed perpendicular to the plane of the wire loops. Over a period of 2.36 s, the magnetic field fades away to zero. What is the average induced emf (voltage) in the coil over this period of time?