Question 2

  • Electric Field of a Uniformly Charged Wire

    charged wire gaussian surface

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Question 9

c As charging progresses, Vb=1R+— current decreases and charge increases. At vc=o -r/ RC Charge on -'IRC Charging current 1-+0 6

Question 31

2R •

  • What is the magnitude of the magnetic field at the surface of the outer conductor?

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Question 32

1 A long wire of radius R carries a current I, as shown above, with a current density J = ar that increases linearly with the distance r from the center of the wire. Which of the following graphs best represents the magnitude of the magnetic field B as a function r ?

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Question 33

Р) 10V (А) CHARGED —10V (В) DISCHARGING (4) с с

Does the direction of the current change when the capacitor goes from charging to discharging? Yes. When a capacitor is charging, current flows towards the positive plate (as positive charge is added to that plate) and away from the negative plate. When the capacitor is discharging, current flows away from the positive and towards the negative plate, in the opposite direction.

Question 34

  • Gauss's Law for Magnetism

    • The total magnetic flux through any closed surface is zero

    • This would not be true if magnetic monopoles were found to exist

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Question 35

Inductor current cannot change instantaneously i(0 ) i(0 ) i(0)e time constant T Capacitor voltage cannot change instantaneously v(0 ) v(0 ) v(t) v(0)e time constant T = RC

Resonant Frequency Formula where 'f' = frequency in hertz 'L' = inductance in henrys 'C' = capacitance in farads The formula also holds true if used with the units of megahertz. microhemies and microfarads and many other combinations of units.

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