Q.

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : The outer body of an air craft is made of metal which protects persons sitting inside from lightning strikes.

Reason (R) : The electric field inside the cavity enclosed by a conductor is zero.

In the light of the above statements, choose the most appropriate answer from the options given below:          [2025]

1 Both (A) and (R) are correct and (R) is the correct explanation of (A)  
2 (A) is correct but (R) is not correct  
3 Both (A) and (R) are correct but (R) is not the correct explanation of (A)  
4 (A) is not correct but (R) is correct  

Ans.

(1)

The outer body of aircraft is made with metal to provide electrostatic shielding such that electric field inside craft remain zero for any charge on outer surface.