Q.

Statement(A) : Steridian is the solid angle subtended at the centre of the sphere by its surface, the area of which is equal to square of the radius

 Statement(B) : The solid angle around a point is 4π steradian

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a

Both A and B are true

b

Both A and B are false

c

A is true, B is false

d

A is false, B is true

answer is A.

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Statement(A) : Steridian is the solid angle subtended at the centre of the sphere by its surface, the area of which is equal to square of the radius Statement(B) : The solid angle around a point is 4π steradian