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Chapter 22: Q21CQ (page 809)

Is the force attractive or repulsive between the hot and neutral lines hung from power poles? Why?

Short Answer

Expert verified

Force will be repulsive between the hot and neutral lines hung from power poles.

Step by step solution

01

Hot and Neutral lines

The "hot" wire is in black color which carries electricity from the breaker panel to the switch or light source.

The "neutral" wire is in white color that returns any unneeded electricity and current to the breaker panel.

02

Force between hot and neutral lines

  1. The hotline is the line that carries current through it but the neutral line does not.

  2. This indicates that current will be induced in the neutral line as a result of the hot line’s electric field.

  3. The current will flow in the opposite direction resulting in a repulsive force between the lines.

Therefore, the force will be repulsive between the hot and neutral lines hung from power poles.

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Most popular questions from this chapter

What force is exerted on the water in an MHD drive utilizing a25.0‐cm-diameter tube, iflocalid="1654594579558" 100‐Acurrent is passed across the tube that is perpendicular to alocalid="1654594587153" 2.00‐Tmagnetic field? (The relatively small size of this force indicates the need for very large currents and magnetic fields to make practical MHD drives.)

Draw a diagram and use RHR-1 to show that the forces on the top and bottom segments of the motor’s current loop in Figure 22.34 are vertical and produce no torque about the axis of rotation.

The force on the rectangular loop of wire in the magnetic field in Figure 22.56 can be used to measure field strength. The field is uniform, and the plane of the loop is perpendicular to the field. (a) What is the direction of the magnetic force on the loop? Justify the claim that the forces on the sides of the loop are equal and opposite, independent of how much of the loop is in the field and do not affect the net force on the loop. (b) If a current of 5.00 A is used, what is the force per tesla on the 20.0-cm-wide loop?


Figure 22.56 A rectangular loop of wire carrying a current is perpendicular to a magnetic field. The field is uniform in the region shown and is zero outside that region.

What is the direction of the velocity of a negative charge that experiences the magnetic force shown in each of the three cases in Figure22.51, assuming it moves perpendicular to B?

Repeat Exercise 22.1 for a negative charge.
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