Question

I want to know how to do the questions in the simplest way possible.

25) The magnetic field at a point P, a certain distance from a long wire carrying a current of 2 .0 A, is 1.2 x 10 T. How far is P from the center of the wire? A) 11 cm B) 22 cm C) 33 cm D) 44 cm E) 55 cm Answer: C 26) The magnetic field due to the current in a long. straight wire is 8.0 uT at a distance of 4.0 cm from the center of the wire. What is the current in the wire? A) 0.20 A B) 0.40 A C) 0.80 A D) 3.2 A E) 1.6A Answer: E 27) The magnetic field due to a 2-A current flowing in a long, straight wire is 8 uT at a point P, a certain distance away from the wire. How far is this point from the center of the wire? A) 2 cm B) 3 cm C) 4 cm D) 5 cm E) 6 cm Answer: D 28) The magnetic field at a distance of 2 cm from a current carry ing wire is 4 uT. What is the magnetic field at a distance of 4 cm from the wire? A) 2 μΤ Β) 4 μΤ C)6 μ D) 8 μΤ Ε) 10 μΤ Answer: A

Answer 1

SarorCobn erg 25 Curm T = 2.0A Magnehz Are d I 1.2410-6T B i9n (etdistancu of poin p from UOdo he f arioe . cantre 9d /Mre Mag hahz Ae!d due d a lohg aibe Ac loI ACD 02)200 277 ト2*106 2 TTY 2T 210 2 =0.333m 3 1210-6 = 0.133 m 33 CM AY S-C