I allready attached the questions! Document Preview: A 4-mC point charge moving with a speed V= 80Ž??+120j Respect to an endless wire vertical, which carries a current of 3 A as shown in Fig. If the distance between the load and the wire is 7 mm, determining the magnetic force:on The charge.b) On the wire2- A conducting loop, which has the shape of an equilateral triangle, is placed within a magnetic field of magnitude equal to 0.6 T, as shown in Fig. If the legs of the triangle are 20 cm and the current I = 8 A, find the magnetic force on each section of the wire.A lead wire form concentric semicircles of radius a = 4 cm and b = 7 cm. Using the Biot-Savart law, calculate the magnetic field in the center of the semicircle if the current flowing through them is 3.5 A.4-A solenoid 10 cm diameter and 75 cm long is made of copper wire with a diameter of 1 mm. The wire is wound on a cardboard tube forming a single layer. Each wire loop is adjacent to the next round, as shown in Fig. What power P should be applied to the solenoid so that the center generates a magnetic field of 12 milli-Tesla? Remember that power is measured in Watts.5-A coil of 800 turns has a circular shape whose diameter is 15 cm. A magnetic field incident perpendicular to the coil and varies with time according to the function B= 0.75t Tesla. Determining the emf induced in the coil and the current through it if the resistance of the coil is 3 Ohms.6-A rectangular loop with sides a = 12 cm and b = 8 cm moves to the right with a speed of 5 m / s, leaving a magnetic field of constant magnitude equal to 0.4 Tesla. Calculate the emf induced in the wire and the direction of the induced current. Attachments: Exercise.doc