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Chapter 16: Q6Q (page 662)

In Figure 16.58, what is the direction of the electric field? Is 鈭哣 = Vf 鈭扸i positive or negative?

Short Answer

Expert verified

The direction of the electric field is towards the ball and the potential difference is negative.

Step by step solution

01

Concept/Significance of the potential difference.

A potential difference is the amount of work required to move a charge from one location in the electric field to another.

It refers to the amount of labour or energy necessary to move an electron in a circuit or a specific spatial area of the electrical field.

02

Determination of the direction of the electric field and sign of the potential difference.

The electric field always points from the positive charge to the negative charge. As shown in figure 16.58, thecharges on the ball are negative. it means the electric field is towards the ball.

The positive side has higher potential energy than the negative side. So, the potential difference which is given by,

鈭�V=Vf-Viis negative as the potential is directed to the negative charges on the ball.

Thus, the direction of the electric field is towards the ball, and the potential difference is negative.

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Most popular questions from this chapter

An electron starts from rest in a vacuum, in a region of strong electric field. The electron moves through a potential difference of 35V.

(a) What is the kinetic energy of the electron in electron volts (eV)?

(b) What would happen if the particle were a proton?

If the kinetic energy of an electron is 4.4脳10-18J, what is the speed of the electron? You can use the approximate (non relativistic) equation here.

If throughout a particular region of space the potential can be expressed as V=4xz+2y-5z, what are the vector components of the electric field at location (x,y,z)?

As shown in Figure 16.72, three large, thin, uniformly charged plates are arranged so that there are two adjacent regions of uniform electric field. The origin is at the center of the central plate. Location A is <-0.4,0,0>m, and location B is<0.2,0,0>m . The electric fieldE1鈫� has the value <725,0,0>V/m, and E2鈫�is <-425,0,0>V/m.

(d) What is the minimum kinetic energy the electron must have at location A in order to ensure that it reaches location B?

You travel along a path from location A to location B, moving in a direction opposite to the direction of the net electric field in that region. What is true of the potential difference VB-VA?(1)VB-VA>0,(2)VB-VA<0,(3)VB-VA=0.
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