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PhysicsJEE Main 23 Jan 2026, Shift 2·Q23·Numerical·Easy–moderate

Units and Measurements · Dimensional analysis

A ball of radius rr and density ρ\rho dropped through a viscous liquid of density σ\sigma and viscosity η\eta attains its terminal velocity at time tt, given by t=A ρa rb ηc σdt = A\,\rho^{a}\,r^{b}\,\eta^{c}\,\sigma^{d}, where AA is a constant and aa, bb cc and dd are integers. The value of b+ca+d\dfrac{b+c}{a+d} is .

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