An electron moving perpendicular to a uniform magnetic field of 0.22 T moves in a circle with a speed of 1.5 × 107 m/s. What is the radius of the circle? (e =

The 1.0 [cm] × 4.0 [cm] rectangular loop is 1.0 [cm] away from a long straight wire. The wire carries a current of 1.0 [A]. What is the magnetic flux through the loop? Loop Long straight wire 4.0 cm 1.0 cm 1.0 cm

A mixture contains two types of particles, 40K and an unknown substance, X. 4°K has a mass of 6.64x10-26 kg but the mass of substance X is not known. The charge on both substances is the same but also unknown. The particles are launched into the mass spectrometer at a speed of 6750 m/s. The mass spectrometer has a 7.47x103 T magnetic field pointing out of the page (as shown below). The 4°K particles hit a semi-circular detector with a diameter of 25.0 cm and substance X hits the detector with diameter of 28.0 cm Path of °K ions Velocity selector Path of substance X ions Mass Spectrometer Magnetic Field out of page Part A The charge on the particles is: q = 4,80x10-19 C Submit Previous Answers v Correct Part B How many electrons were removed from 4°K and substance X? ? Ne = Submit Request Answer Part C What is the mass of substance X? mx = kg

3. In the diagram below there are two long, parallel, current carrying wires. The upper wire also has a semi-circular section of radius 15.0 cm. The distance between the wires is 20.0 cm. The upper wire carries a current of 2.00 A to the right and the lower wire carries a current of 14.0 A to the right. What is the magnitude of the net or total magnetic field at point P due to both wires (in uT)? Point P is at the center of the semi-circular section. 2A (A) 5.00 (B) 7.53 (C) 9.81 •P 个 (D) 12.3 (E) 2.31 (F) 15.0 20cm 14A

Physics 6. A loop of area 0.250 m2 is in a uniform 0.020 0-T magnetic field. If the flux through the loop is 3.8310-3 T·m2, what angle does the normal to the plane of the loop make with the direction of the magnetic field?

4. An alpha particle of charge +2e and mass 4(1.66 × 10-27) kg, and an ¹60 nucleus of charge +8e and mass 16(1.66 × 10-27) kg have been accelerated from rest through the same electric potential. They are then injected into a uniform magnetic field B, where both move at right angles to the field. The ratio of the radius of the path of the alpha particle to the radius of the path of the nucleus ¹60 is a. ra/ro = 1/1 b. ra/ro = 1/4 ra/ro = 1/8 ra/ro = 1/2 None of these is correct. c. d. e.

1. A magnetic field has a magnitude of 1.50 × 10-³ T, and an electric field has a magnitude of 4.00 × 10³ N/C. Both fields -3 point in the same direction. A positive 2.5 µC charge moves at a speed of 2.50 × 106 m/s in a perpendicular to both fields. Determine the magnitude of the net force that acts on the charge. N ssfánection that is 0 ssf60 sf60 ss 50 ssf6 €60 ssf60 ss

9. An infinite sheet of current lying in the yz plane carries a surface current of linear density J, (i.e. amps/m). The current is in the positive z direction and J; represents the current per length measured along the y axis. Prove that the magnetic field near the sheet is parallel to the sheet and perpendicular to the current direction, with a magnitude of Ho Js / 2.

5. Once more, please refer to the figure. This time the charge is 7.98 x 10^-6 C, the magnetic field strength is 2.68 T and the electric field strength is 1.70 x 10^5 N/C. The charge experiences a total force of magnitude 15.00 N as it enters the region. What is its speed as it enters the region?   1.08E+06 m/s   6.38E+05 m/s   4.47E+05 m/s   9.57E+05 m/s