UnitExam5Csolutions

UnitExam5Csolutions - ID: C UCSD Physics 2B Answer Section...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
ID: C 1 UCSD Physics 2B Unit Exam 5C AC Circuits Answer Section MULTIPLE CHOICE 1. ANS: D emf =− d Φ dt d NBA × cos ω t () = NBA × sin t V peak = max emf Ê Ë Á ˆ ¯ ˜ = NBA = NBA 2 π f Ê Ë Á ˆ ¯ ˜ A = V 2 f Ê Ë Á ˆ ¯ ˜ NB 370 V 2 3.14 60 Hz 300 0.025 T = 0.131 m 2 TOP: GENERATOR 2. ANS: A X R = R = 470 Ω X C = 1 C = 1 57.2 × 10 5 rad / s Ê Ë Á Á Á ˆ ¯ ˜ ˜ ˜ 320 × 12 F Ê Ë Á Á Á ˆ ¯ ˜ ˜ ˜ = 546 Ω X L = L = 57.2 × 5 rad / s Ê Ë Á Á Á ˆ ¯ ˜ ˜ ˜ 97 × 6 F Ê Ë Á Á Á ˆ ¯ ˜ ˜ ˜ = 555 Ω The resistor has the lowest reactance, and therefore draws the most current. TOP: REACTANCE 3. ANS: E P = IV I = P V = 4.6 × 3 W 120 V = 38.3 A 35 A TOP: CIRCUIT BREAKER 4. ANS: D 2 = 1 LC L = 1 2 C = 1 7500 cycles sec Ê Ë Á Á Á Á Á Á Á ˆ ¯ ˜ ˜ ˜ ˜ ˜ ˜ ˜ 2 rad cycle Ê Ë Á Á Á Á Á Á ˆ ¯ ˜ ˜ ˜ ˜ ˜ ˜ È Î Í Í Í Í Í Í Í Í Í Í ˘ ˚ ˙ ˙ ˙ ˙ ˙ ˙ ˙ ˙ ˙ ˙ 2 13.0 × 3 F Ê Ë Á Á Á ˆ ¯ ˜ ˜ ˜ = 3.47 × 8 H = 34.7n H TOP: LC CIRCUIT 5. ANS: E V rms = 1 2 V = 0.707 375 V = 265 V TOP: RMS
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ID: C 2 6. ANS: C
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

UnitExam5Csolutions - ID: C UCSD Physics 2B Answer Section...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online