Question 1: A particle with a mass of 6.64 !! 10-27 kg and a charge of +3.20 !! 10-19 C is accelerated from rest through a potential difference of 2.45 !! 106 V. The particle then enters a uniform 1.60-T magnetic field. If the particle's velocity is perpendicular to the magnetic field at all times, what is the magnitude of the magnetic force exerted on the particle? [5]
Question 2: A 0.150-m wire oriented horizontally between the poles of an electromagnet carries a direct current of 12.5 A. The angle between the direction of the current and that of the magnetic field is 25.0"". If the magnetic field strength is 0.625 T, what is the magnitude and direction of the magnetic force on the wire between the poles? [5]
Question 3: Two long, straight wires separated by 0.10 m carry currents of 18 A and 6 A in the same direction as shown.
Determine:
(a) The magnitude of the magnetic field at the point P. [5]
(b) The direction of the magnetic field at the point P. [5]
Question 4: A wire is bent into the shape of a circle of radius r = 0.10 m and carries a 20.0-A current in the direction shown.
(a) What is the direction of the magnetic field at the center of the loop? [5]
(b) What is the magnitude of the magnetic field at the center of the loop? [5]