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Chapter 4: Q46E (page 876)
A 1.50- F capacitor is charging through a 12.0-鈩� resistor using a 10.0-V battery. What will be the current when the capacitor has acquiredof its maximum charge? Will it beof the maximum current?
When the capacitor has acquired of its maximum charge then the current will be 0.625 A
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Question: The circuit shown in Fig. P26.74, called a Wheatstone Bridge, is used to determine the value of an unknown resistor X by comparison with three resistors M, N, and P whose resistances can be varied. For each setting, the resistance of each resistor is precisely known. With switches S1 and S2 closed, these resistors are varied until the current in the galvanometer G is zero; the bridge is then said to be balanced. (a) Show that under this condition the unknown resistance is given by X = MP/N. (This method permits very high precision in comparing resistors.) (b) If galvanometer G shows zero deflection when M = 850.0 鈩�, N = 15.00 鈩�, and P = 33.48 鈩�, what is the unknown resistance X?
Why does an electric light bulb nearly always burn out just as you turn on the light, almost never while the light is shining?
An alpha particle (a He nucleus containing two protons and two neutrons and having a mass of ) travelling horizontally at enter a uniform, vertical, magnetic field.(a) What is the diameter of the path followed by this alpha particle? (b) what effect does the magnetic field have on the speed of the particle? (c) What are the magnitude and direction of the acceleration of the alpha particle while it is in the magnetic field? (d) explain why the speed of the particle does not change even though an unbalanced external force acts on it.
A particle of mass 0.195 g carries a charge of. The particle is given an initial horizontal velocity that is due north and has magnitude. What are the magnitude and direction of the minimum magnetic field that will keepthe particle moving in the earth鈥檚 gravitational field in the samehorizontal, northward direction?
Two 120-V light bulbs, one 25-W and one 200-W, were connected in series across a 240-V line. It seemed like a good idea at the time, but one bulb burned out almost immediately. Which one burned out, and why?
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