Exam3_2004Spr

Exam3_2004Spr - Physics 8.02 TEST 3 Mashup PLEASE DETACH...

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Physics 8.02 TEST 3 Mashup Spring 2004 PLEASE DETACH THIS SHEET AND USE AT YOUR CONVENIENCE Some (possibly useful) Relations: = surface closed o inside Q ε dA E outside to inside from points dA = = b a a b b to a from moving V V V ds E C Q V U = 1 2 C V 2 = Q 2 2C d A o plate parallel κ = C τ = RC V = i R P joule = i V = i 2 R = V 2 /R 2 ˆ 4 o q r µ π × = vr B 2 ˆ 4 o I r × = ds r dB F = q v × B ext ext I dF ds B τ τ = µ µ × B = dA B ds E dt d ε = N d φ B dt L = N B i ε = L di dt / LR = U L = 1 2 L i 2 u B = | B | 2 2 0 T = 2 π ω = 1 f thru o E closed path E open surface d dI dt where d µµε =+ Φ= ∫∫ oo Bs EA Φ G G G G v Free RLC Circuit No Damping: 0 () s in ( ' ) Qt Q t ω = + , 1 ' LC = Driven LRC Circuit: if ε (t) = ε m sin( ω t ), then i (t) = i m sin( ω t - φ ), where i m = ε m R 2 + ω L – 1 ω C 2 1/2 and tan φ = ω L – 1 ω C R 1 LC XLX C ==
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8.02T Spring 2004 Exam 3 Mashup 1 Problem 1: Eight Multiple Choice Questions (24 points) Circle your choice for the correct answer to the eight questions given below. A: The three light bulbs in the circuit below are identical. What happens to the brightness of bulbs A and B when the switch is closed? (a) A stays the same, B dims (b) A brighter, B dims (c) A and B both brighter (d) A and B both dimmer (e) A and B remain the same B. The resistors and batteries in the circuit below are all identical. Which circuit or circuits have the least power delivered to it? (1) (2) (3) (a) Circuit 1 (b) Circuit 2 (c) Circuit 3 (d) Circuit 1 = Circuit 2 (e) Circuit 1 = Circuit 3
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8.02 Spring 2004 Exam 3 Mashup 2 C: Twelve resistors each of resistance R are hooked up so that they from a cube in the manner shown. The equivalent resistance of this arrangement for current flowing in the path indicated is (a) 3 R (b) 4 3 R (c) 5 6 R (d) 1 3 R (e) 1 6 R D:. A circuit consists of a battery with emf V, an inductor with inductance L , a capacitor with capacitance C , and three resistors, each with resistance R , as shown in the sketch. The capacitor is initially uncharged and there is no current flowing anywhere in the circuit.
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Exam3_2004Spr - Physics 8.02 TEST 3 Mashup PLEASE DETACH...

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