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• Topic:

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At a certain place, the horizontal component B0 and the vertical component V0 of the earth's magnetic field are equal in magnitude. The total intensity at the place will be

(a) ${B}_{0}$                            (b) ${B}_{0}^{2}$

(c) $2{B}_{0}$                          (d) $\sqrt{2}{B}_{0}$