Please Answer problem 10, thank you~ Problem 10: It turns out that two flat plat
ID: 1874128 • Letter: P
Question
Please Answer problem 10, thank you~
Problem 10: It turns out that two flat plates with opposite charge will create an clec-: tric ficild between them that is nearly constant. This is called a parallel plate capacitor, and a depiction is shown to the right. (a) Suppose a particular capacitor creates an clectric ficld of 2.0 × 105 N/C. An unfortunate insoct flics into the the capacitor, and obtains a net charge of -3 0 × 10-7 C by landing on the ncgative plate. What is the clcctric force on the fly (magnitude and dircction)? (b) If the inscct (mass: 3.0 x 10-6 kg) starts from rest on the negative plate, and is pushed by the cleetric foree such that it smashes into the positive plate with a speed of 1.5 m /s, what is the voltage betwen the two plates? Neglot ar rcsistance (Hint: think about conservation of energy) I: 3.0 x 101kg) starts from rest on the negative plate, and Problem 11: The top of a Van de Graff gencrator can reach a potential of over 1 million volts However, a shock from a Van de Graff is qiite safd: whercas a shock from a 120 V wall ontlet can serionusly hurt you. Why s this: (Hint: hows are elects related? potential and clectric potential cncr Problem 12. Jack. a curious yoing scicntist. m akH a simple cireit ii which a 12V battery s a light bulb (a)Jack measures that the light bulb enits 60 W of power. What is the current running through the bulb? (b)l What is thf the buitb?Explanation / Answer
10.
Electric force on the fly
F=qE =(-3*10-7)(2*105)=-0.06 N
Magnitude
|F|=0.06 N
Direction towards positive plate
b)
By Conservation of energy
qV=(1/2)mv2
(3*10-7)*V=(1/2)*(3*10-6)*1.52
V=11.25 Volts