1.

Gravitational field at the centre of a semicircle formed by a thin wire AB of mass m and length \[\ell \]is

A. \[\frac{Gm}{{{\ell }^{2}}}\operatorname{along}+x-axis\]          
B. \[\frac{Gm}{\pi {{\ell }^{2}}}\operatorname{along}+y-axis\]
C. \[\frac{2\pi Gm}{{{\ell }^{2}}}\operatorname{along}+x-axis\]
D. \[\frac{2\pi Gm}{{{\ell }^{2}}}\operatorname{along}+y-axis\]
Answer» E.


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