3. Consider a charged particle, q, in the presence of a magnetic field B with velocity i = vt + 7z = 7 + T at position f relative to origin experiencing a magnetic force qü x B. From the second law it follows that the kinetic energy of the particle remains constant[ see figure 3] : du d mv? m[v로 + 매 dữ (a) : qü x B - 7. (gữ x B] = ở . (m-1 - 0 = (True, False) m a constant dt dt 2 (b) : Ä [B x Č) Č. [Ä x B] = B [Č × A] (True, False)
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- Let's try a few more examples that relate power and energy. A certain high-efficiency LED light bulb has a power output of 9.20 W. That is, 9.20 J of electric energy is converted to electromagnetic (light) energy and radiated away every second. How much energy is output by the lightbulb if it is left on for a total time of 7.50 hours? In this case, we're relating power to energy change, so we simply use the relationship E t P = Here, instead of work W, we use in the equation E, which is the amount of energy output or converted in the amount of time t. From this, what do we find the total energy output in joules to be? 33120 X x Solve the above equation for the energy E in terms of power P and time t. Remember that 1 W = 1 J/s, so to find the energy in joules, convert the time to seconds first. There are 60 minutes in one hour and 60 seconds in one minute. JAn electron initially at rest, is allowed to accelerate through a potential difference of 1 V, gaining kinetic energy KEe, whereas a proton, also initially at rest, is let accelerate through a potential difference of 1 V, gaining kinetic energy KEp. As ∣qe∣ = ∣qp∣ but mp >> me, therefore, Group of answer choices KEe >> KEp KEe << KEp KEe = KEp All we can say, is KEe ≠ KEpelectron in a well. digure 24-65 shows eletric potential V along an x axis. the scale of the vertical axis is set by Vs=8.0V. An eletron is to be released at x=4.5 cm with intial kinetic energy 3.00eV. (a) if it is initially moving in the negative direction of the axis, does it reach a turning point (if so. what is the x coordinate of that point) or does it escape from the plotted region (if so, what is it its speed at x=0)? (b) if it is initially moving in the posiitve direction of the axis, does it reach a turning point (if so, what is the x coordinate of that point) or does it escape from the plotted region (if so, what is its speed at x=7.0 cm)? what are the (C) magnitude F and (d) direction (positive or negative direction of the x axis) of the electric force on the electron if the electron moves just to the left of x=4.0 cm? What are (e)F and (f) the direction if it moves just to the right of x=5.0cm?
- SEE ATTACHEDIf an electron travels 0.200 m from an electron gun to a TV screen in 36.3 ns, what voltage was used to accelerate it? (Note that the voltage you obtain here is lower than actually used in TVs to avoid the necessity of relativistic corrections.)Please help with explanation. I will upvote
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