Chapter 18, Problem 3MCQ

If you place a block made of a conducting material in an external uniform electric field ${\stackrel{\to }{E}}_0$ so that two opposite sides of the block are perpendicular to ${\stackrel{\to }{E}}_0$, what will be the magnitude and direction of the net $\stackrel{\to }{E}$ field inside the block?

a. magnitude $E_0$

, direction: same as ${\stackrel{\to }{E}}_0$

b. magnitude $E_0$

, direction: opposite to ${\stackrel{\to }{E}}_0$

c. magnitude: less than $E_0$ but more than zero; direction: same as ${\stackrel{\to }{E}}_0$

d. magnitude: more than $E_0$

; direction: same as ${\stackrel{\to }{E}}_0$

e. magnitude: zero