16. A wire of uniform charge density λ and length L lies along the x axis as shown in Figure. What is the electric potential at point A? [k=1/(4πε)] (A)\( k\lambda\ln[1+d/L] \) (B)\( k\lambda\ln[1+L/d] \) (C)\( k\lambda L/d \) (D)\( k\lambda d/L \) (E)\( k\lambda d(L+d) \)

6. A small disk of radius \( R_1 \) is fastened coaxially to a larger disk of radius \( R_2 \). The combination is free to rotate on a fixed axle, which is perpendicular to a horizontal frictionless table top, as shown in the overhead view below. The rotational inertia of the combination is I. A string is wrapped around the larger disk and attached to a block of mass m, on the table. Another string is wrapped around the smaller disk and is pulled with a force \( \overrightarrow{F} \) as shown in fig. below. The tension in the string pulling the block is: (A)\( \frac{mR_1F}{R_2} \) (B)\( \frac{mR_1R_2F}{I - mR_2^2} \) (C)\( \frac{mR_1R_2F}{I + mR_2^2} \) (D)\( \frac{mR_1R_2F}{I - mR_1R_2} \) (E)\( \frac{mR_1R_2F}{I + mR_1R_2} \)

16. A wire of uniform charge density λ and length L lies along the x axis as shown in Figure. What is the electric potential at point A? [k=1/(4πε)]
(A)\( k\lambda\ln[1+d/L] \)
(B)\( k\lambda\ln[1+L/d] \)
(C)\( k\lambda L/d \)
(D)\( k\lambda d/L \)
(E)\( k\lambda d(L+d) \)

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