A ball with a mass of 200 g which contains 3.50×108 excess electrons is dropped into a vertical shaft with a height of 115 m. At the bottom of the shaft, the ball suddenly enters a uniform horizontal magnetic field that has a magnitude of 0.200 T and direction from east to west. a) If air resistance is negligibly small, find the magnitude of the force that this magnetic field exerts on the ball just as it enters the field. Use 1.602×10−19 C for the magnitude of the charge on an electron. b) Find the direction of the force that this magnetic field exerts on the ball just as it enters the field. North to south/South to north

A ball with a mass of 200 g which contains 3.50×108 excess electrons is dropped into a vertical shaft with a height of 115 m. At the bottom of the shaft, the ball suddenly enters a uniform horizontal magnetic field that has a magnitude of 0.200 T and direction from east to west. a) If air resistance is negligibly small, find the magnitude of the force that this magnetic field exerts on the ball just as it enters the field. Use 1.602×10−19 C for the magnitude of the charge on an electron. b) Find the direction of the force that this magnetic field exerts on the ball just as it enters the field. North to south/South to north

Similar questions

At the equator, the earth’s field is essentially horizontal; near the north pole, it is nearly vertical. In between, the angle varies. As you move farther north, the dip angle, the angle of the earth’s field below horizontal, steadily increases. Green turtles seem to use this dip angle to determine their latitude. Suppose you are a researcher wanting to test this idea. You have gathered green turtle hatchlings from a beach where the magnetic field strength is 50 μT and the dip angle is 56°. You then put the turtles in a 1.2-m-diameter circular tank and monitor the direction in which they swim as you vary the magnetic field in the tank. You change the field by passing a current through a 100-turn horizontal coil wrapped around the tank. This creates a field that adds to that of the earth. What current should you pass through the coil, and in what direction, to produce a net field in the center of the tank that has a dip angle of 62°?
An electron moves in a circular path perpendicular to a uniform magnetic field with a magnitude of 2.03 mT. If the speed of the electron is 1.49 x 107 m/s, determine the following. (a) the radius of the circular path cm (b) the time interval required to complete one revolution Additional Materials M eBook
A lightning bolt may carry a current of 1.00 104 A for a short time. What is the resulting magnetic field 110 m from the bolt? Suppose that the bolt extends far above and below the point of observation.
A lightning bolt may carry a current of 1.00 104 A for a short time. What is the resulting magnetic field 50 m from the bolt? Suppose that the bolt extends far above and below the point of observation.
A wire of mass 10 grams and length 50 cm carries a Southward current of 2A while resting on a horizontal table on Earth. a) If a vertically downward uniform magnetic field of 0.2 T is applied, determine the direction and magnitude of the magnetic force on the wire. b) Determine the acceleration of the wire if its coefficient of kinetic friction with the table is 0.4. c) Determine the direction and magnitude of the smallest uniform magnetic field required to levitate the wire.
A horizontal current-carrying wire that is perpendicular to the plane of the paper is placed in a uniform magnetic field of magnitude 2.2 mT that is parallel to the plane of the paper and points down. At the distance 1.0 cm to the right of the wire, the total magnetic field is zero.
A lightning bolt may carry a current of 1.00 104 A for a short time. What is the resulting magnetic field 110 m from the bolt? Suppose that the bolt extends far above and below the point of observation.
A proton at point A has a speed of V=1.0x106 m/s and d = 25 cm. Find the magnitude of the magnetic field that will cause the proton to move along a circular path from A to B. (T) A(+ d
Two long, parallel wires separated by 50 cm each carry currents of 4.0 A in a horizontal direction. a) Find the magnetic field midway between the wires if the currents are in the same direction. b) Find the magnetic field midway between the wires if the currents are in opposite directions.
A wire having mass per unit length of 0.480 g/cm carries a 2.14 A current horizontally to the south. What are the direction and magnitude of the minimum magnetic field needed to lift this wire vertically upward? magnitude T direction ---Select--- northward westward eastward southward