Q.

Consider the following statements.(A) A large force is required to draw apart normally two glass plates enclosing a thin water film.(B) Water works as glue and sticks two glass platesSelect the correct option.(a) (A) is false, But (B) is true.(b) Both (A) and (B) are true.(c) (A) is true, But (B) is false.(d) Both (A) and (B) are false.

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a

Both (A) and (B) are true.

b

(A) is true but (B) is false.

c

(A) is false but (B) is true.

d

Both (A) and (B) are false.

answer is C.

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Detailed Solution

force is required to detach the plates due to surface energy of the film of water. but the force is not large.
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Consider the following statements.(A) A large force is required to draw apart normally two glass plates enclosing a thin water film.(B) Water works as glue and sticks two glass platesSelect the correct option.(a) (A) is false, But (B) is true.(b) Both (A) and (B) are true.(c) (A) is true, But (B) is false.(d) Both (A) and (B) are false.