A circular coil of radius 2.5 cm has 27 turns of wire. It is placed in a magnetic field directed perpendicular to the plane of the loop. If the field decreases uniformly from 500 mT to zero in 0.800 s, what is the induced emf in the coil while the field is changing.

A wire loop with an area of 2.4×10−2 m2m2 is in a magnetic field of 0.40 TT directed at an angle 30∘ to the plane of the loop. If the field drops to zero in 41 ms , what is the average induced emf in the loop? Express your answer using two significant figures.

A 185‑turn circular coil of radius 3.79 cm and negligible resistance is immersed in a uniform magnetic field that is perpendicular to the plane of the coil. The coil is connected to a 14.5 Ω resistor to create a closed circuit. During a time interval of 0.147 s, the magnetic field strength decreases uniformly from 0.537 T to zero. Find the energy ? in millijoules that is dissipated in the resistor during this time interval.

A generator has a N = 220-turn coil with a radius of 5.03 cm. It rotates with a frequency of f = 27 times per second in a B = 1.33 T magnetic field. What is the maximum emf induced in the coil?

A 140-turn circular coil has diameter 5.0 cm . A magnetic field perpendicular to the coil is changing at 0.85 T/s . Can you help in conceptually understanding how to figure out the induced emf in the coil?

A 40-loop circular coil has a radius of 10.0 cm. It is placed in a magnetic field so that the field lines from a parmanent magnet (B) are normal to the area of the coil. If the magnet is brought toward the loop so its magnetic field varies from 0.2 T to 0.70 T in 2 microsecond, the induced emf through each coil would be Group of answer choices 3.95 x 105 V 87.9 x 104 V 2.80 MV 7.85 kV

An 44-turn coil has square loops measuring 0.353m along a side and a resistance of 4.1902. It is placed in a magnetic field that makes an angle of 48.9° with the plane of each loop. The mannitude of this field varies 3 with time according to B = 2.85t, where t is measured in seconds and B in teslas. What is the induced current in the coil at t = 1.79s ? An 11-tum coll has square loops measuring 0.353 m along a side and a resistance of 1.19 12. It is placed in a magnetic field that makes an angle of 18.9° with the plane of each loop. The magnitude of this field varies with time according to B-2.8513, where is measured in seconds and 8 in teslas. What is the induced current in the coil at -1.79 ?

Consider a 12-loop coil with a diameter of 8 cm; a north-leading bar magnet moves further away from the coil (where the bar magnet is perpendicular to the cross section of the coil, and the north pole is closest to the coil as the magnet moves away). The magnetic field value changes from 0.065 T to 0.00065 T in 1.6 s.   What is the induced emf for the coil?  emf =    V

The figure below displays a circular loop of metal wire in a uniform magnetic field pointing into the page. The radius of the loop is 15.0 cm and the magnitude of the field is 0.120 T.  You grab points A and B and pull them in opposite directions, stretching the loop until its area is nearly zero, taking a time of 0.210 s to do so. What is the magnitude of the average induced emf in the loop (in mV) during this time?

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?