| A | B |
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| What is the force per meter on a wire carrying a 9.80-A current when perpendicular to a 0.80-T magnetic field? What is the angle between the wire and field is 45 degrees? | ??? |
| A 1.5-m length of wire carrying 6.5 A of current is oriented horizontally. At that point on the Earth's surface, the dip angle of the Earth's magnetic field makes an angle of 40 degrees to the wire. Estimate the magnetic force on the wire due to the Earth's magnetic field of 5.5 x 10^-5 T at this point. | ??? |
| How much current is flowing in a wire 4.20 m long if the maximum force on it is 0.900 N when placed in a uniform 0.800-T field? | ??? |
| The force on a wire carrying 25.0 A is a maximum of 4.14 N when laced between the pole faces of a magnet. If the pole faces are 22.0 cm in diameter, what is the approximate strength of the magnetic field? | ??? |
| Determine the magnitude and direction of the force on an electron traveling 3.58 x 10^6 m/s horizontally to the west in a vertically upward magnetic field of strength 1.30 T. | ??? |
| Describe the path of an electron that is projected vertically upward with a speed of 1.80 x 10^6 m/s into a uniform magnetic field of 0.250 T that is directed away from the observer. | ??? |
| Alpha particles of charge q = +2e and mass m = 6.6 x 10^-27 kg are emitted from a radioactive source at a speed of 1.6 x 10^7 m/s. What magnetic field strength would be required to bend these into a circular path of radius r = 0.25 m? | ??? |
| Jumper cables used to start a stalled vehicle often carry a 15-A current. How strong is the magnetic field 15 cm away? | ??? |
| If a magnetic field no larger than that of the Earth (0.55 x 10^-4 T) is to be allowed 30 cm from an electrical wire, what is the maximum current the wire can carry? | ??? |
| What is the magnitude and direction of the force between two parallel wires 45 m long and 6.0 cm apart, each carrying 35 A in the same direction? | ??? |
| A vertical straight wire carrying an upward 12-A current exerts an attractive force per unit length of 8.8 x 10^-4 N/m on a second parallel wire 7.0 cm away. What current (magnitude and direction) flows in the second wire? | ??? |
