Home Physics Electrostatics Potential & Capacitance NCERT An uncharged aluminium block has a cavity wi…
Physics Electrostatics Potential & Capacitance NCERT MCQ (Single Correct)

An uncharged aluminium block has a cavity within it. The block is placed in a region where a uniform electric field which is directed upwards. Which of the following is a correct statement describing conditions in the interior of the block’s cavity?

A
The electric field in the cavity is directed upwards
B
The electric field in the cavity is directed downwards
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

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Text Solution

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The correct answer is:
C

Electric field is zero inside a metallic cavity if no charge is present in the cavity, whatever be the field outside.

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