A conductor of mass 0.720 kg rests on two parallel rails as in the figure that is d=12.0 cm apart and L=45.0 cm long. The conductor carries a current of I=86.4 A in the direction shown and can slide frictionlessly. A uniform magnetic field of magnitude 0.2 Tis directed perpendicular to the conductor and the rails. If it starts from rest, what is the kinetic energy ( in J) of the conductor as it leaves the rails? L. Select one: O A. 0.93 2. O B. 1.52 Oc. 1.28 OD. 1.62 O E. 0.76

A rod of mass 0.720 kg and radius 6.00 cm rests on two parallel rails (see figure below) that are d = 12.0 cm apart and L = 45.0 cm long. The rod carries a current of I = 70.0 A in the direction shown and rolls along the rails without slipping. A uniform magnetic field of magnitude 0.260 T is directed perpendicular to the rod and the rails. If it starts from rest, what is the speed of the rod as it leaves the rails? (Assume that the rod is of uniform density.) m/s L tea

As shown in the figure, a rectangular loop with a length of 20.0 cm and a width w of 15.0 cm has 20 turns and carries a current of 0.41 A counterclockwise around the loop when viewed from the positive x-axis. A horizontal (parallel to the x-z plane) magnetic field of magnitude 0.049 T is oriented at an angle of 65° relative to the perpendicular to the loop (the positive x-axis). (Assume the length and width are measured along the z and y-axes, respectively.) (a) Find the components of the magnetic force acting on each side of the loop. FTOP, X Components of the magnetic force acting on the top section of the loop. N B N N FTOP, Y FTop, z = = = FBottom, y Components of the magnetic force acting on the bottom section of the loop. FBottom, x N N N FBottom, z Fright, x Fright, y Fright, z Z Components of the magnetic force acting on the left section of the loop. FLeft, x = N FLeft, y = N FLeft, z = N O O O Components of the magnetic force acting on the right section of the loop. N N N 0° =…

Problem 4: A loop of wire with radius r0.045 m is in a magnetic field with magnitude B as shown in the figure. B changes from B,-0.45 T to B,-7.5 T inAt = 2.5 s at a constant rate. The resistance of the wire is R 8 Ω Randomized Variables r0.045 m B,-0.45T B2=7.5 T At- 2.5 s R=862 Part (a_Express the magnetic flux cp going through a loop of radius r assuming a constam magnetic field B. HOME 4 5 6 BACKSPACE CLEAR Submit Hint I give up! Hints: 1% deduction per hint. Hints remaining: 1 Feedback: 1% deduction per feedback Part (b) Express the magnetic flux change, Ф, in terms of B1, B2 and r. Part (c) Calculate the numerical value ofΔΦ in T.m Part (d) Express the magnitude of the average emf, ε, induced in the loop in terms of ΔΦ and Δ ▲ Part (e) Calculate the numerical value of the emf in V Part (f) Express the current induced in the loop, I, in terms ofe and kR

The figure below shows a cube with side length d = 13.8 cm with one of its corners at the origin. The cube is subject to a uniform magnetic field B = (2î - 6ĵ – 5k) T. y (a) What is the magnetic flux through the top face of the cube? Wb (b) What is the total magnetic flux through all six faces of the cube? Wb

An astronaut is connected to her spacecraft by a 29-m-long tether cord as she and the spacecraft orbit Earth in a circular path at a speed of 4.1  103 m/s. At one instant, the voltage measured between the ends of a wire embedded in the cord is measured to be 0.44 V. Assume the long dimension of the cord is perpendicular to the vertical component of Earth's magnetic field at that instant. (a) What is the magnitude of the vertical component of Earth's field at this location? uT(b) Does the measured voltage change as the system moves from one location to another? Explain.

The slide generator in the figure below is in a uniform magnetic field of magnitude 0.0500 T. The bar of length 0.340 m is pulled at a constant speed of 0.500 m/s. The U-shaped conductor and the bar have a resistivity of 2.75 ✕ 10−8 Ω · m and a cross-sectional area of 9.00 ✕ 10−4 m2. Find the current in the generator when  x = 0.680 m.  (Note that the  A  in the image below is the area of the loop, not the cross-sectional area of the conductor and bar.)

A coil has 250 turns enclosing an area of 11.8 cm2 . In a physics laboratory experiment, the coil is rotated during the time interval 0.045 s  from a position in which the plane of each turn is perpendicular to Earth's magnetic field to one in which the plane of each turn is parallel to the field. The magnitude of Earth's magnetic field at the lab location is 5.40×10−5 T . What is the magnitude of the magnetic flux through one turn of the coil before it is rotated? What is the magnitude  of the magnetic flux through one turn of the coil after it is rotated?

A very long thin wire produces a magnetic field of 0.0050×10−4 T at a distance of 3.0mm from the central axis of the wire. Calculate the magnitude of the current in the wire. (μ0 = 4π×10−7 T · m/A)

A device called a railgun uses the magnetic force on currents to launch projectiles at very high speeds. An idealized model of a railgun is illustrated as shown. A 1.2 V power supply is connected to two conducting rails. A segment of copper wire, in a region of uniform magnetic field, slides freely on the rails. The wire has a 0.85 mΩ resistance and a mass of 5.0 g. Ignore the resistance of the rails. When the power supply is switched on,a. What is the current?b. What are the magnitude and direction of the force on the wire?c. What will be the wire’s speed after it has slid a distance of 1.0 mm?