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P1Hard11SprPHYC131 - 8 At a time t = 0 the terminals of a...

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Physics 131 – Practice Test 1 1. Find the electric field vector at the point shown. Use k = 9 × 10 ⁹ . 2. What is the electric field 10cm from the central axis of a long, uniform metal bar upon which a total charge of 120 µ C has been placed? The radius of the bar is 15cm . 3. Find E at the location shown in the diagram to the right. The sphere is non-conducting and uniform. Express your answer in terms of ε ₀ . 4. What is the force on 1nC charged particle located between two large parallel plates with a voltage difference of 5000V and separated by a distance of 1mm ? 5. Simplify the capacitive network shown. -125nC 3m 4m field point x ˆ y ˆ 3m 4m field point ρ =16C/m ³ 2 µ F 2 µ F 4 µ F 20 µ F
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6. For the DC circuit shown, find the power being consumed by the 2k Ω resistor. 7. The circuit to the right contains four identical light bulbs. List them in order of decreasing brightness.
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Unformatted text preview: 8. At a time t = 0 , the terminals of a 200k Ω resistor are connected to the terminals of a 3 µ F capacitor carrying a 12 µ C charge on its positive side. Find the expression for the voltage V across the capacitor as a function of time. 9. Solve for the current phasor through the four-ohm resistor in the AC circuit shown. 10. A solenoid oriented along the x-axis as shown has 100 turns and an overall length of 10cm . If the current through its coils is ½ A , find the force vector on a particle carrying a charge q that enters the interior region of the solenoid with an initial velocity vector of v ѐ = (-7x ˆ +2y ˆ – z ˆ )m/s . Express your answer in terms of q and µ ₀ . 2k Ω 10k Ω 30V 4k Ω 22V A D B C 110V 8 cos (2000t)V 4 Ω ⅛ mF I x ˆ...
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