Questions from College Physics

Q: Figure P19.64 is a setup that can be used to

Figure P19.64 is a setup that can be used to measure magnetic fields. A rectangular coil of wire contains N turns and has a width w. The coil is attached to one arm of a balance and is suspended betwe...

Q: Two coplanar and concentric circular loops of wire carry currents of I1

Two coplanar and concentric circular loops of wire carry currents of I1 = 5.00 A and I2 = 3.00 A in opposite directions as in Figure P19.65. (a) If r1 = 12.0 cm and r2 = 9.00 cm, what are the magnitud...

Q: An electron moves in a circular path perpendicular to a constant magnetic

An electron moves in a circular path perpendicular to a constant magnetic field of magnitude 1.00 mT. The angular momentum of the electron about the center of the circle is 4.00 x 10-25 kg · m2/s. Det...

Q: Two long, straight wires cross each other at right angles,

Two long, straight wires cross each other at right angles, as shown in Figure P19.67. (a) Find the direction and magnitude of the magnetic field at point P, which is in the same plane as the two wires...

Q: A 0.200 - kg metal rod carrying a current of

A 0.200 - kg metal rod carrying a current of 10.0 A glides on two horizontal rails 0.500 m apart. What vertical magnetic field is required to keep the rod moving at a constant speed if the coefficient...

Q: Using an electromagnetic flow-meter (Fig. P19.69

Using an electromagnetic flow-meter (Fig. P19.69), a heart surgeon monitors the flow rate of blood through an artery. Electrodes A and B make contact with the outer surface of the blood vessel, which...

Q: A uniform horizontal wire with a linear mass density of 0.

A uniform horizontal wire with a linear mass density of 0.50 g/m carries a 2.0 - A current. It is placed in a constant magnetic field with a strength of 4.0 x 10-3 T. The field is horizontal and perpe...

Q: Three long, parallel conductors carry currents of I = 2.

Three long, parallel conductors carry currents of I = 2.0 A. Figure P19.71 is an end view of the conductors, with each current coming out of the page. Given that a = 1.0 cm, determine the magnitude an...

Q: Two long, parallel wires, each with a mass per unit

Two long, parallel wires, each with a mass per unit length of 0.040 kg/m, are supported in a horizontal plane by 6.0 - cm - long strings, as shown in Figure P19.72. Each wire carries the same current...

Q: Protons having a kinetic energy of 5.00 MeV are moving

Protons having a kinetic energy of 5.00 MeV are moving in the positive x - direction and enter a magnetic field of 0.0500 T in the z - direction, out of the plane of the page, and extending from x = 0...