Phy102&08-S-final

Phy102&08-S-final - 1 1 Part I: Solve the following...

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Unformatted text preview: 1 1 Part I: Solve the following 10 problems 1. An electron escapes from the surface of a conducting sphere with radius 5 cm and charge -5 µC. What is the highest acceleration which the electron experiences? (2 points) 2 R kQe F = 2 18 10 2 . 3 − × = = ms m F a 2. What is the electric flux through the top face of the cube shown? The side of cube is a = 15 cm and the electric field, in N/C, is k j i E ˆ 200 ˆ 700 ˆ 500 − + − = r . (2 points) ( ) ∫ ∫ ⋅ − + − = = dA k k j i A d E ˆ ˆ 200 ˆ 700 ˆ 500 . r r φ = C m N a / 5 . 4 200 2 2 ⋅ − = − = y x z a top face 2 2 3. In the figure below, the ring with radius R = 6 cm is in the x-y plane and is centered at the origin. The ring carries a uniformly distributed charge of +2 nC. An electron is released from rest along the z-axis at z = 8 cm. What is the kinetic energy of the electron, in eV, as it passes through the origin? (3 points) → Δ − = Δ U K as K in =0 ( ) J z R kQ R kQ e K 17 2 1 2 2 10 92 . 1 − × =         + − = eV K 120 = 4. The electric potential V in a region of space is given by V = x 2 – 3 y 2 + z 2 where V is in volts and x, y and z are in meters. What is the magnitude of the electric field at a point with coordinates x = y = z = 1 m? ( 3 points ) i i x V E ∂ ∂ − = so ( ) k z j y i x E ˆ 2 ˆ 6 ˆ 2 + − − = r ( ) k j i E ˆ 2 ˆ 6 ˆ 2 1 , 1 , 1 − + − = r C N C N E / 6 . 6 / 2 6 2 2 2 2 = + + = y x z R 3 3 5. The capacitors C 1 = 3.00 µF, C 2 = 6.00 µF and C 3 = 4.00 µF are fully charged; the capacitor C 2 has a plate charge of 18.0 µC. What is the voltage across the capacitor has a plate charge of 18....
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This note was uploaded on 11/03/2009 for the course PHY 101 taught by Professor Exams during the Spring '07 term at Kuwait University.

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Phy102&08-S-final - 1 1 Part I: Solve the following...

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