PHYS-102-Q-II-SUM-08-SOL

PHYS-102-Q-II-SUM-08-SOL - OUTLINE OF SOLUTIONS PHYS-102...

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OUTLINE OF SOLUTIONS PHYS-102 SUMMER-08 QUIZ-II Time Limit: 50 min. Notes : 1 . For problems 2 and 3, your solutions must have adequate details to get full credit. F = q E ; 12 2 kQ Q F r = ; 1/ 4πε 0 = 92 910 kx N m C 2 = , U = kQ 1 Q 2 /r V = kQ/r ; 1/C ser = 1/C 1 + 1/C 2 +1/C 3 +…. ; C = Q/V C par. = C 1 + C 2 +C 3 +….; U = QV/2 ; - Δ W field = U = W ext ; E x = - dV/dx ____________________________________________________________________ NOTE: For Prob.1, below, please circle the answer of your choice for each part. 1a . ( 3pts .)Consider two conducting metallic spheres S1 and S2 . The radius of S1 is half that of S2 . Each sphere is given an excess positive charge Q . If the two spheres now are brought in electrical contact: [a] charge will flow from S1 to S2 .( since V = kQ/r, SI will be at a higher potential than S2) [b] charge will flow from S2 to S1 . [c] no charge flow will take place. [d] the charge on each sphere will double. 1b ( 3pts. ) When the potential difference between the plates of a capacitor is doubled, the magnitude of the electric energy stored in the capacitor: [a] is doubled [b] is halved [c] remains the same [d] quadrupled ( U = QV/2= CV 2 /2)
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PHYS-102-Q-II-SUM-08-SOL - OUTLINE OF SOLUTIONS PHYS-102...

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