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Question

The dimensions of the area A of a black hole can be written in terms of the universal constant G, its mass M and the speed of light c as A=GαMβcγ. Here

A
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B
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C
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D
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Solution

The correct option is B
A=GαMβcγL2=(M1L3T2)α(M1)β(L1T1)γBy comparingα+β=0...........(1)3α+γ=0...........(2)2αγ=0..........(3)
By solving (1),(2),(3)
α=2,β=2,and γ=4

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