A bar slides to the right at a constant speed of 2.1 m/s on two frictionless rails. The resistance of resistor R is 5.2 0, and a 2.5 T constant magnetic field is directed perpendicularly downward, into the page. Let { = 1.2 m. Bin R app (a) Find the current passing through the resistor. I = (b) The direction of magnetic force on the moving bar is O No magnetic force O Right O Left O Out of the page O Into the page x x X x x x x x x x x x x X X x x x x x x x X
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- Find the direction and magnitude of the minimum velocity of charge q = +2e that will produce the magnetic force F shown in the figure below. (Measure the angle counterclockwise from the x axis in the xz plane. Take the magnitudes of F as 1.95 10-11 N and the magnitude of B as 2.14 T.) Find the magnitude and direction.(a) A straight conducting wire is placed perpendicularly to the carth magnetic field at a location. The carth magnetic field at the location has a magnitude of 0.450 G. Determine the current that must flow in the wire for a 9.50 cm length of the wire to experience a magnetic force of 1.50 N due to the carth magnetic field. [1T = 10* G] A wire of length 1.0 m carries a current of 1.0 A. The wire is formed into a circular coil and the circular coil has one turn only. Determine the magnitude of the maximum torque which is developed on the coil if it is placed in magnetic (b) field of 2.0 T. 2.The figure shows the end view of a long straight conducting rod mounted on a lab bench. A second such rod is attached to a point directly above the first rod by a cable that is 30.0 cm long. If the current in the rod mounted to the table is 35.0 A directed away from you (into the page) and the mass per unit length of the rod attached to the cord is 45.0 g/m, determine the magnitude and direction of the current in the free rod in order for the angle ? to be 3.00°.
- At a certain location, Earth has a magnetic field of 0.60 × 104 T, pointing 75° below the horizontal in a north-south plane. A 9.8 m long straight wire carries a 11 A current. (a) If the current is directed horizontally toward the east, what are the magnitude and direction of the magnetic force on the wire? Magnitude |N Direction O horizontal and directed due east O horizontal and directed due west O 15° above the horizontal in the northward direction O 75° above the horizontal in the northward direction O 15° below the horizontal in the southward direction O 75° below the horizontal in the southward direction (b) What are the magnitude and direction of the force if the current is directed vertically upward? Magnitude |N Direction O horizontal and directed due west O 15° above the horizontal in the northward direction O 75° below the horizontal in the southward direction O 75° above the horizontal in the northward direction 15° below the horizontal in the southward direction O…A В trach [Pitch charged particle with speed U = 3.5 x 10° m/s enters a uniform magnetic field of B = 1.5 T. The velocity of the particle makes an angle of t/3 rad with the magnetic field. Mass and charge of the particle are m = 4.5 x 10-2 kg and q = 6.4 x 10-°C, respectively. Find the pitch of the helical path taken by the particle in units of millimeters. Answer:A vertical straight wire carrying an upward 7.0 A current exerts an attractive force per unit length of 1.2 x 10-4 N/m on a second parallel wire 28 cm away. Calculate the current (in A) in the second wire.
- The closed loop shown in the figure below carries a current of 5.10 A in the counterclockwise direction. The radius of the outer arc is 71.0 cm, that of the inner arc is 31.0 cm. Find the magnitude of the magnetic field at point P if the angle θ=60∘.Calculate the magnitude of the magnetic force exerted on a wire that is 20 mm long and carries a current of 4.0 A when it is suspended inside a solenoid at an angle of 45 to the magnetic field. The solenoid has 750 turns per meter of length and carries a current of 3.0 A.At the equator, near the surface of the Earth, the magnetic field is approximately 50.0 ?T northward, and the electric field is about 100 N/C downward in fair weather. Find the gravitational, electric, and magnetic forces on an electron in this environment, assuming that the electron has an instantaneous velocity of 2.00 ✕ 106 m/s directed to the east.
- At the equator, near the surface of Earth, the magnetic field is approximately 55.0 µT northward, and the electric field is about 200 N/C downward in fair weather. Find the gravitational, electric, and magnetic forces on an electron with instantaneous velocity of 6.00 ✕ 106 m/s directed to the east in this environment.Two long, straight wires are parallel and 23 cm apart. (a) If each wire carries a current of 53 A in the same direction, what is the magnitude of the magnetic force per meter (in N/m) exerted on each wire? N/m (b) Does the force pull the wires together or push them apart? O The wires are pulled together. O The wires are pushed apart. O The magnetic force per meter is zero. (c) What happens if the currents flow in opposite directions? O The wires are pulled together. O The wires are pushed apart. O The magnetic force per meter is zero.At the equator, near the surface of Earth, the magnetic fieldis approximately 50.0 µT northward, and the electric field isabout 100. N/C downward in fair weather. Find the gravitational,electric, and magnetic forces on an electron with aninstantaneous velocity of 6.00 x 106 m/s directed to the eastin this environment.