A straight wire with a length of 30 cm carries a current of 7A. The wire is orie

Question

A straight wire with a length of 30 cm carries a current of 7A. The wire is oriented perpendicular to a magnetic filed of 0.5 T. What is the size of the magnetic force exerted on the wire? show calculation: A current following through a long straight wire causes a magnetic field that points radially outward from the wire. (B) along the wire. (C) along concentric circles around the wire. Calculate the magnetic flux through a square loop of 2 cm times 20m oriented perpendicular to a magnetic filed of 0.5 T. ________ Tm^2. A coil of wire with 50 turns and a cross-sectional area of 0.01 m2 lies with its plane perpendicular to a magnetic field of 1.5 T The coil is rapidly removed from the field in a time of 0.2 s What is the initial magnetic flux through the coil? __________ Tm^2 What is the induced voltage in the coil? _________ V A step-down transformer has 200 turns on the primary and 20 turns on the secondary The primary is connected to AC of 100 volts. The voltage

Explanation / Answer

27.solution

magnetic flux = BA*sin(theta) = 0.5*(2*10-2m*2*10-2m) = 2*10-4 Tm²

29.solution

E2 / E1 = v2 / v1 = N2 / N1

V2 = (N2 / N1)*V1 = (20 / 200)*100v = 10 Volts

30.solution

F = q*(v x B); if v and B are at right angles this is simply q*v*B

F = q*v*B = 0.06*600*B = N (B is not given)

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