1. A long, straight wire has a current of 11 = 35 A going upward. Next to this wire is a rectangular loop of wire with a clockwise current of 12 = 25 A. One side of the loop is 10 cm from the straight wire, and the other side is 30 cm from the straight wire. a. What is the magnitude and direction of the magnetic field from the I,↑ 1₂ 10CM 30см 50cm straight wire, on the left side of the loop? b. What is the magnitude and direction of the magnetic field from the straight wire, on the right side of the loop? c. What is the magnitude and direction of the force on the left side of the loop? d. What is the magnitude and direction of the force on the right side of the loop?

2. Two very long straight wires (treat as infinite) carry currents in the direction shown. a. Draw arrows (or write or ) for the magnetic field at point P due to (i) the current I and (ii) the current 31. b. Determine the magnitude of the magnetic field at point P. I 2L L I 31

Option 2: a. An electron is moving at a speed of 4.45 x 105 m/s from north to south in a magnetic field that runs from [NE] to [SWJ. If the magnetic force balances the gravitational force on the electron, determine the strength of the magnetic field. b. Now consider a 50.0 cm long wire with a mass of 60.0 g that carries a current of 15.0 A from north to south. The uniform magnetic field is perpendicular to the above- mentioned wire. What the minimum magnetic field strength and direction that will balance the weight of the wire?

An oxygen-16 with a mass of 2.656 × 10-26 kg travels at 6.50 × 106 m/s perpendicular to a 1.2- tesla magnetic field, which makes it move in a circular arc with a 0.898-meter radius. Hint a. What is the amount of postive charge on the ion? Amount of charge on the ion is x 10-¹⁹ C. b. Based on your answer in (a), how many electrons has this oxygen-16 lost? This oxygen-16 lost electrons.