Teaching NVS PGT 2024 Test Series Physics Units, Dimensions and Measurements Dimensional formulae and dimensional equations
In a modified form of Coulomb’s law let us write F = \(\frac{1}{4 \pi ε_0}\left(\frac{l_1 I_2}{r^2}\right)\), where I1 and I2 are currents because of flowing charges q1 and q2. Then the dimensional formula for ε0 is
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M–1 L–3 T2 A2
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M1 L3 T-4 A-2
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M1 L3 T2 A-2
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M1 L3 T-4 A-1