Figure 27-64 shows the circuit of a flashing lamp, like those attached to barrels at highway construction sites. The fluorescent lamp L (of negligible capacitance) is connected in parallel across the capacitor C of an RC circuit. There is a current through the lamp only when the potential difference across it reaches the breakdown voltage V L ; then the capacitor discharge completely through the lamp and the lamp flashes briefly. For a lamp with breakdown voltage V L = 72.0 V, wired to a 95.0 V ideal battery and a 0.150 μ F capacitor, what resistance R is needed for two flashes per second? Figure 27-64 Problem 62.
Figure 27-64 shows the circuit of a flashing lamp, like those attached to barrels at highway construction sites. The fluorescent lamp L (of negligible capacitance) is connected in parallel across the capacitor C of an RC circuit. There is a current through the lamp only when the potential difference across it reaches the breakdown voltage V L ; then the capacitor discharge completely through the lamp and the lamp flashes briefly. For a lamp with breakdown voltage V L = 72.0 V, wired to a 95.0 V ideal battery and a 0.150 μ F capacitor, what resistance R is needed for two flashes per second? Figure 27-64 Problem 62.
Figure 27-64 shows the circuit of a flashing lamp, like those attached to barrels at highway construction sites. The fluorescent lamp L (of negligible capacitance) is connected in parallel across the capacitor C of an RC circuit. There is a current through the lamp only when the potential difference across it reaches the breakdown voltage VL; then the capacitor discharge completely through the lamp and the lamp flashes briefly. For a lamp with breakdown voltageVL = 72.0 V, wired to a 95.0 V ideal battery and a 0.150 μF capacitor, what resistance R is needed for two flashes per second?
For the three vectors shown, the magnitude of vector A is 5 [m], the magnitude of vector B is 7 [m],
and the magnitude of vector C is 4 [m].
(a) Find the x- and y-components of the resultant vector Ŕ = Ả + B + Č. Do not forget to include
the directional unit vector for each component.
(b) What is the magnitude of the resultant vector Ŕ?
(c) In what direction is the resultant vector Ŕ pointing? Write the answer in terms of an angle
with the proper indication of the direction.
60.0 degree
20.0 degree
+x
C
Exercise No 2
Four forces are exerted on the object shown in the figure. (Forces are measured in newtons,
abbreviated N.) The net force on the object is Fnet = F₁ + F₂ + F3 + F₁ = 4.0î N. What are (a) F3 and
(b) F₁? Give your answers in component form.
y
F3
نیا
F₁
5.0 N
6.0 N
20°
F₂
x
What are the x and y components of the vector that must be added to the following three vectors, so
that the sum of the four vectors is zero? Due east is the +x direction, and due north is the ty direction.
A113 units, 60.0° south of west
B=222 units, 35.0° south of east
C=177 units, 23.0° north of east
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How To Solve Any Circuit Problem With Capacitors In Series and Parallel Combinations - Physics; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=a-gPuw6JsxQ;License: Standard YouTube License, CC-BY