ELECTRIC POTENTIAL A freak lightning storm came by and charged the roofs so that

Question

ELECTRIC POTENTIAL

A freak lightning storm came by and charged the roofs so that the electric potentials are as in Fig. 2. (Only the top view and a protractor are shown.)

The electric field can be calculated if the potential is known at several locations; see Sect. 26.2, and Example 26.5 in your textbook and the example on page Y4-5 of your lab manual. Find the magnitude of the electric field at location PP. For distances, use the meter scale on the picture; measure to an appropriate degree of accuracy.

0.5 1.5 2.5 2.5 1.5 0.5 voltages in volts FIGURE 2 5.0 volts 6.0 volts 7.0 volts olts CN RRA 90 135 meters 10 PROTRACTOR (Use this scale for figure 2 only.) 18

Explanation / Answer

We know

E=-dV/dx

For PP

dV=1 volts

dx=1m

So E=1 N/C pointing towards region of decreasing potential

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