Two long straight wires enter a room through a door. One carries a current of 3.0 A into the room while the other carries a current of 5.0 A out. What is the magnitude of the path integral $B.ds around the door frame? O 6.3 x 10-6 T-m O 2.5 x 10-6 T-m O 3.8 x 10-6 T-m O None of these O 1.0 x 10-6 T-m

An infinitely long filament on the x-axis carries a current of 10 mA in the k direction. FindH at P(3, 2,1) m

B₁ X B>A>C C>B>A B>A=C AY X X A>B>C A=B=C=0 Consider a cross-section through an ideal torus. The arrangement of wires is shown in the figure, and each wire carries an identical current, i (x means current into the page, a dot means current out of the page). Three possible Amperian paths are shown as the dotted circles, the largest is C, the smallest is A. Rank the magnitude of the magnetic field you would find on the three Amperian paths.

Each of the eight conductors in the figure carries 3.15 A of current into or out of the page. Two paths are indicated for the line integral B. ds. What is the value of the integral for (a) path 1 and (b) path 2?

The force per meter between the two wires of a jumper cable being used to start a stalled car is 0.025 N/m. What is the current in the wires, given they are separated by 2.00 cm? 60 A None above 50 A 15 A 30 A

dle X COE Question 4 Finish attempt.. The figure shows, in cross section, several conductors that carry currents through the plane of the figure. The currents have the magnitudes I, = 4 A,l2 = 6 A, and I3 = 2 A, and the directions shown. Four paths, labeled a through d, are shown. Not yet answered Marked out of What is the line integral OB.dL for the path b 2.00 P Flag question 1,0 d. Select one: 1.01 x 10 Tm 2.14 x 10 T.m -5.03 x 105 Tm 2.51 x 10-6T.m None of these is correct 3.01 x 10 Tm X.

Taking R = 1.50 kΩ and ε = 150 V in the figure shown below, determine the magnitude and direction of the current in the horizontal wire between a and e. 17.5 mA, from e to a19.9 mA, from a to e    18.0 mA, from e to a18.9 mA, from a to e18.0 mA, from a to e19.9 mA, from e to a

T A 2.0 x 102-km-long high-voltage transmission line 2.0 cm in diameter carries a steady current of 1.0 x 10° A. If the conductor is copper with a free charge density of 8.5 × 1028 electrons/m³, how many years does it take one electron to travel the full length of the cable?

A positive charge moves near a very long wire carrying a current as shown. If the 3.1 C charge moves at 9×105 m/s and is 11 cm away from the 7 A current in the long wire, what is the magnitude of the force on the charge? (in N)(a) 1.26(b) 3.55×101(c) 1.95×107(d) 1.12×102

A caterpillar of length 6.00 cm crawls in the direction of electron drift along a 8.20-mm-diameter bare copper wire that carries a uniform current of 38.0 A. (a) What is the potential difference between the two ends of the caterpillar? (b) Is its tail positive or negative relative to its head? (c) How much time does the caterpillar take to crawl 2.30 cm if it crawls at the drift speed of the electrons in the wire? (The number of charge carriers per unit volume is 8.49 × 1028 m-3 and resistivity of copper is 1.69 × 10-8 Ω·m.)