In the figure, two circular arcs have radii a = 13.3 cm and b = 11.5 cm, subtend angle e =77.0°, carry current i = 0.345 A, and share the same center of curvature P. What are the (a) magnitude and (b) direction (into or out of the page) of the net magnetic field at P? P

two long straight wires are perpendicular to the page and separated by distance d1= 0.75 cm. Wire 1 carries 6.5 A into the page.What are the (a) magnitude and (b) direction (into or out of the page) of the current in wire 2 if the net magnetic field due to the two currents is zero at point P lo- cated at distance d2 = 1.50 cm from wire 2?

As shown in the figure below, two long parallel wires (1 and 2) carry currents of I1 = 3.00 A and I2 = 5.10 A in the direction indicated. (a) Determine the magnitude and direction of the magnetic field at a point midway between the wires (d = 10.0 cm). and (b) Determine the magnitude and direction of the magnetic field at point P, located d = 10.0 cm above wire 1.

A long, straight, hollow wire with inner radius 3.0 mm and outer radius 8.ó mm has 2.4 A of current passing through, uniformly distributed throughout its cross-sectional area. Determine the magnitude of the magnetic field by the wire a radial distance of 6.3 mm from its axis. Give your answer in units of µT.

A straight wire carries a current of 10.0 A ABCD is a rectangle with its point D at the half of a 1.10-mm segment of the wire, and its point C is on the wire. Calculate the magnitude y direction of the magnetic field due to this segment at point A.

The diagram shows two long straight wires carrying the following currents in the directions shown:I1 = 3.2 AI2 = 0.8 AThe net magnetic field at P, which is 1.8 cm from I1 and 2.5 cm from I2, is the vector sum of the fields from both wires. Calculate in tesla the magnitude of the net magnetic field at P.

An infinitely long straight wire is bent, as shown in the figure. The circular portion has a radius of 10 cm and its center Oisa distance r from the straight part. The current I flowing in the wire is 9 A R Find the magnitude of the magnetic field (in mT) at the center O due to the circular wire. Find the value of the distance r (in cm) such that the net magnetic field at the center of the circular portion is zero.

Figure (a) shows two wires, each carrying a current. Wire 1 consists of a circular arc of radius R = 0.017 m and two radial lengths; it carries current i₁ = 2.0 A in the direction indicated. Wire 2 is long and straight; it carries a current is that can be varied; and it is at distance R/2 from the center of the arc. The net magnetic field B due to the two currents is measured at the center of curvature of the arc. Figure (b) is a plot of the component of B in the direction perpendicular to the figure as a function of current i2. The horizontal scale is set by i2s = 1.0 A. What is the angle subtended by the arc? Number i 1.99 421 (a) Units rad B V 0 ią (A) 125

A metal rod of 2.50m long stands vertically near the earth’s equator carrying a current of10.0A away from the ground. The earth’s magnetic field at the location has a magnitude of 0.500 10 to negative 4th power Tand points directly to the north. (a) what is the smallest angle between the current inthe rod and the magnetic field of Earth at that location? (b) What is the magnitude of the magneticforce on the rod? (c) What is the direction of the magnetic force on the rod?

Three long, parallel conductors each carry a current of I = 2.00 A. Figure is an end view of the conductors, with each current coming out of the page. Taking a = 1.00 cm, determine the magnitude and direction of the magnetic field at point A. (Hint: The magnetic field of a long, straight, current-carrying conductor at all points on a circle of radius r around the conductor is B = where Ho = 4n x 10-7 T.m/A). 2ar I