Questions from Modern Physics

Q: (a). What is the speed of a beam of electrons

(a). What is the speed of a beam of electrons when the simultaneous influence of an electric field of 1.56 × 104 V/m and a magnetic field of 4.62 × 10-3 T, with both fields normal to the beam and to e...

Q: The circuit shown in Fig. E27.39 is used to

The circuit shown in Fig. E27.39 is used to make a magnetic balance to weigh objects. The mass m to be measured is hung from the center of the bar that is in a uniform magnetic field of 1.50 T, direct...

Q: At temperatures near absolute zero, Bc approaches 0.142 T

At temperatures near absolute zero, Bc approaches 0.142 T for vanadium, a type-I superconductor. The normal phase of vanadium has a magnetic susceptibility close to zero. Consider a long, thin vanadiu...

Q: A 10.0-cm-long solenoid of diameter 0

A 10.0-cm-long solenoid of diameter 0.400 cm is wound uniformly with 800 turns. A second coil with 50 turns is wound around the solenoid at its center. What is the mutual inductance of the combination...

Q: A solenoidal coil with 25 turns of wire is wound tightly around

A solenoidal coil with 25 turns of wire is wound tightly around another coil with 300 turns (see Example 30.1). The inner solenoid is 25.0 cm long and has a diameter of 2.00 cm. At a certain time, the...

Q: At any point in space, the electric field

At any point in space, the electric field

Q: Two coils are wound around the same cylindrical form, like the

Two coils are wound around the same cylindrical form, like the coils in Example 30.1. When the current in the first coil is decreasing at a rate of -0.242 A/s, the induced emf in the second coil has m...

Q: A toroidal solenoid has 500 turns, cross-sectional area 6

A toroidal solenoid has 500 turns, cross-sectional area 6.25 cm2, and mean radius 4.00 cm. (a). Calculate the coil’s self-inductance. (b). If the current decreases uniformly from 5.00 A to 2.00 A in...

Q: The inductor in Fig. E30.11 has inductance 0.

The inductor in Fig. E30.11 has inductance 0.260 H and carries a current in the direction shown that is decreasing at a uniform rate, di/dt = -0.0180 A/s. Fig. E30.11: (a). Find the self-induced e...

Q: The inductor shown in Fig. E30.11 has inductance 0

The inductor shown in Fig. E30.11 has inductance 0.260 H and carries a current in the direction shown. The current is changing at a constant rate. Fig. E30.11: (a). The potential between points a...