Questions from Modern Physics

Q: A long, straight wire carries a 13.0-A

A long, straight wire carries a 13.0-A current. An electron is fired parallel to this wire with a velocity of 250 km/s in the same direction as the current, 2.00 cm from the wire. (a). Find the magnit...

Q: An electron is moving in the vicinity of a long, straight

An electron is moving in the vicinity of a long, straight wire that lies along the x-axis. The wire has a constant current of 9.00 A in the -x-direction. At an instant when the electron is at point (0...

Q: An electric bus operates by drawing direct current from two parallel overhead

An electric bus operates by drawing direct current from two parallel overhead cables, at a potential difference of 600 V, and spaced 55 cm apart. When the power input to the bus’s motor is at its maxi...

Q: Two long, straight, parallel wires are 1.00 m

Two long, straight, parallel wires are 1.00 m apart (Fig. P28.63). The wire on the left carries a current I1 of 6.00 A into the plane of the paper. Fig. P28.63: (a). What must the magnitude and di...

Q: Your physics study partner asks you to consider a parallelplate capacitor that

Your physics study partner asks you to consider a parallelplate capacitor that has a dielectric completely filling the volume between the plates. He then claims that Eqs. (29.13) and (29.14) show that...

Q: The long, straight wire AB shown in Fig. P28.

The long, straight wire AB shown in Fig. P28.64 carries a current of 14.0 A. The rectangular loop whose long edges are parallel to the wire carries a current of 5.00 A. Find the magnitude and directio...

Q: Two long, parallel wires hang by 4.00-cm

Two long, parallel wires hang by 4.00-cm-long cords from a common axis (Fig. P28.65). The wires have a mass per unit length of 0.0125 kg/m and carry the same current in opposite directions. What is th...

Q: Several charges enter a uniform magnetic field directed into the page.

Several charges enter a uniform magnetic field directed into the page. (a). What path would a positive charge q moving with a velocity of magnitude v follow through the field? (b). What path would a...

Q: Figure P28.67 is a sectional view of two circular coils

Figure P28.67 is a sectional view of two circular coils with radius a, each wound with N turns of wire carrying a current I, circulating in the same direction in both coils. The coils are separated by...

Q: Calculate the magnetic field (magnitude and direction) at a point

Calculate the magnetic field (magnitude and direction) at a point P due to a current I = 12.0 A in the wire shown in Fig. P28.68. Segment BC is an arc of a circle with radius 30.0 cm, and point P is a...