3. Which of the following does not represent the dimension of force? (m: mass, x: position, v: speed, a: acceleration, k: force constant, q: charge, E: electric field, B: magnetic induction) (A)ma (B)kx (C)qE (D)qB (E)\( mv^2/x \)

9. In the right figure, \( R_1 = 5\Omega \), \( R_2 = 10\Omega \), \( R_3 = 15\Omega \), \( C_1 = 5\mu F \), \( C_2 = 10\mu F \), and the ideal battery has an emf \( \varepsilon = 20V \). In steady state, the total energy stored in the two capacitors is: (A)\( 2.78\times10^{-5} \) J (B)\( 1.12\times10^{-4} \) J (C)\( 2.22\times10^{-4} \) J (D)\( 2.50\times10^{-4} \) J (E)\( 4.72\times10^{-4} \) J

3. Which of the following does not represent the dimension of force? (m: mass, x: position, v: speed, a: acceleration, k: force constant, q: charge, E: electric field, B: magnetic induction)
(A)ma
(B)kx
(C)qE
(D)qB
(E)\( mv^2/x \)

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