A 115-turn circular coil of radius 2.71 cm is immersed in a uniform magnetic field that is perpendicular to the plane of the coil. During 0.

Question

A 115-turn circular coil of radius 2.71 cm is immersed in a uniform magnetic field that is perpendicular to the plane of the coil. During 0.133 s the magnetic field strength increases from 50.1 mT to 90.5 mT. Find the magnitude of the average EMF, in millivolts, that is induced in the coil during this time interval.

in progress 0
Thu Cúc 5 years 2021-08-06T11:33:00+00:00 1 Answers 18 views 0

Answers ( )

  1. Bo
    0
    2021-08-06T11:34:47+00:00
    Reply

    Answer:

    80.6 mV

    Explanation:

    Parameters given:

    Number of turns, N = 115

    Radius of coil, r = 2.71 cm = 0.0271m

    Time taken, t = 0.133s

    Initial magnetic field, Bin = 50.1 mT = 0.0501 T

    Final magnetic field, Bfin = 90.5 mT = 0.0905 T

    Induces EMF is given as:

    EMF = [(Bfin – Bin) * N * A] / t

    EMF = [(0.0905 – 0.0501) * 115 * pi * 0.0271²] / 0.133

    EMF = (0.0404 * 115 * 3.142 * 0.0007344) / 0.133

    EMF = 0.0806 V = 80.6 mV

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )