Electrostatics Question 665
Question: An uncharged aluminum block has a cavity within it. The block is placed in a region where a uniform electric field is directed upward. Which of the following is a correct statement describing conditions in the interior of the block’s cavity?
Options:
A) The electric field in the cavity is directed upward.
B) The electric field in the cavity is directed downward.
C) There is no electric field in the cavity.
D) The electric field in the cavity is of varying magnitude and is zero at the exact center.
Show Answer
Answer:
Correct Answer: C
Solution:
[c] Electric field is zero inside a metallic cavity if no charge is present in the cavity, whatever be the field outside.
