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Title: How much charge can be placed on a capacitor of plate area 20 cm2 with air between the plates before ... Post by: Jjmcadoo on Feb 23, 2018 How much charge can be placed on a capacitor of plate area 20 cm2 with air between the plates before it reaches atmospheric breakdown where E = 3.0 106 V/m? (e0 = 8.85 10-12 C2/Nm2)
a. 6.6 10-7 C c. 5.3 10-8 C b. 2.7 10-8 C d. 4.0 10-7 C [Ques. 2] A ceiling fan is turned on and reaches an angular speed of 60 rev/min in 20 s. It is then turned off and coasts to a stop in 40 s. In the one minute of rotation, through how many revolutions did the fan turn? a. 30 c. 0 b. 60 d. 600 [Ques. 3] A parallel-plate capacitor has dimensions 4.0 cm 5.0 cm. The plates are separated by a 1.0-mm thickness of paper (dielectric constant k = 3.7). What is the charge that can be stored on this capacitor, when connected to a 6.0-V battery? (e0 = 8.85 10-12 C2/Nm2) a. 4.8 10-9 C c. 9.8 10-11 C b. 4.8 10-11 C d. 3.9 10-10 C [Ques. 4] A fan blade, initially at rest, rotates with a constant acceleration of 0.025 rad/s2 . What is the time interval required for it to reach a 10-rad displacement after starting from rest? a. 28 s c. 56 s b. 2.0 s d. 18 s [Ques. 5] The dielectric strength of rutile is 6.0 106 V/m, which corresponds to the maximum electric field that the dielectric can sustain before breakdown. What is the maximum charge that a 10-10-F capacitor with a 0.50-mm thickness of Rutile can hold? a. 0.30 mC c. 0.60 C b. 6.0 C d. 1.7 nC [Ques. 6] A fan blade, initially at rest, rotates with a constant acceleration of 0.025 rad/s2 . What is its angular speed at the instant it goes through an angular displacement of 10 rad? a. 0.025 rad/s c. 0.46 rad/s b. 0.11 rad/s d. 0.71 rad/s [Ques. 7] A sandwich is constructed of two flat pieces of metal (2.00 cm on a side) with a 3.00-mm thick piece of a dielectric called rutile (k = 100) in between them. What is the capacitance? (e0 = 8.85 10-12 C2/Nm2) a. 177 pF c. 100 F b. 118 pF d. 8.85 F [Ques. 8] A 0.30-m radius automobile tire rotates how many rad after starting from rest and accelerating at a constant 3.0 rad/s2 over a 5.0-s interval? a. 12 rad c. 37 rad b. 25 rad d. 0.50 rad [Ques. 9] Inserting a dielectric material between two charged parallel conducting plates, originally separated by air and disconnected from a battery, will produce what effect on the capacitor? a. increase voltage c. increase capacitance b. increase charge d. decrease capacitance [Ques. 10] An object consists of a rod (of length 3.0 m and negligible moment of inertia) to which four small 2.0-kg masses are attached, one at each end and one at each point on the rod 1.0 m from each end. (The masses are one meter apart.) The moment of inertia of this object about an axis perpendicular to the rod and through one of the end masses: a. is 28 kgm2. b. is 12 kgm2. c. is 4 kgm2. d. cannot be uniquely determined until it is stated which inner mass the axis goes through. Title: How much charge can be placed on a capacitor of plate area 20 cm2 with air between the plates before ... Post by: Melisaerickson on Feb 23, 2018 |