The card reader at your bank’s cash machine scans the information that is coded in a magnetic pattern on the back of your card. Why must you remove the card quickly rather than hold it motionless in the card reader’s slot? (i) To maximize the magnetic force on the card; (ii) to maximize the magnetic force on the mobile charges in the card reader; (iii) to generate an electric force on the card; (iv) to generate an electric force on the mobile charges in the card reader.

Part (a) Express the magnitude of the magnetic force on ab or cd, F1, in terms of the length L1, current I and magnetic field B. Part (b) Calculate the numerical value of the magnitude of the force, F1, on ab or cd in N. Part (c) Express the magnitude of the magnetic force on bc or ad, F2, in terms of the length L2, current I and magnetic field B. Part (d) Which direction does the force on ab act? Part (e) Which direction does the force on cd act? Part (f) Express the torque of F1 on ab, with respect of the axis ef, in terms of F1 and L2. Part (g) Express the torque of F1 on cd, with respect of the axis ef, in terms of F1 and L2. Part (h) What is the total torque on the current loop with respect of axis ef, in terms of F1 and L2?Expression   :τ = __________________________________________Select from the variables below to write your expression. Note that all variables may not be required.α, β, π, θ, B, d, F1, g, h, I, L1, L2, m, P, tPart (i) Calculate the numerical value of the total…

A proton moving at 4.30 x 10° m/s through a magnetic field of magnitude 1.62 T experiences a magnetic force of magnitude 8.80 x 105 N. What is the angle between the proton's velocity and the field? (Enter both possible answers from smallest to largest.)

A charged particle moving through a magnetic field at right angles to the field with a speed of 30.7 m/s experiences a magnetic force of 2.98 x 10-4 N. Determine the magnetic force on an identical particle when it travels through the same magnetic field with a speed of 4.84 m/s at an angle of 32.2° relative to the magnetic field.

QUESTION 6 Two long current carrying wires, I and I2, are separated by 2 mm and both carry a current of 8 A. What is the x-component of the magnetic force in newtons on a one meter length of one of the top wire?

Part (a)  Express the magnitude of the magnetic force, F, in terms of q, v, and B. F = ______  Part (b)  Express the radius, R, of the circular motion in terms of the centripetal acceleration a and the speed v.  R = ______

When a charged particle moves perpendicularly to the direction of a uniform magnetic field, the direction of the magnetic force is perpendicular to both the direction of the magnetic field and the direction of the velocity of the charged particle.  Accordingly, the charge begins to move in a circular path.  Since the direction of the magnetic force is toward the center of the circular path the charged particle moves along, the magnetic force is a centripetal force (recall centripetal forces from chapter 5 of the text, covered in PHY 2010).  A schematic of such motion is shown below.  The "X"s represent the magnetic field that is directed into the plane of this screen.  The direction of velocity and magnetic force lie within the plane of this screen and are at right angles to one another, as shown below.   If a charge of magnitude 7.45x10-17C, with speed 4.66x106 m/s, and mass 7.12x10-25kg moves within the magnetic field of magnitude 3.96x10-2T, what is the resulting radius of the path…

A particle that has an 8.6-μC charge moves with a velocity of magnitude 4.8 × 105 m/s along the +x axis. The maximum possible magnetic force that the charge with the given speed could experience has a magnitude of 0.577 N. Find the magnitude of the magnetic field