In the circuit below an ideal battery (electromotive force of 12 V), capacitor o

Question

In the circuit below an ideal battery (electromotive force of 12 V), capacitor of 0. 25 mu F and two 2.0 Ohm resistors are connected. What is the charge on the top plate of the capacitor after it has been fully charged? a) - 30 mu C b) 30 mu C c) -3.0 mu C d) 3.0 mu C When an initially uncharged capacitor is charged in an RC circuit, which is TRUE about its initial and final states? a) It initially acts like an ordinary connecting wire and finally acts like a broken wire. b) It acts like an ordinary connecting wire throughout the charging process. c) It initially acts like a broken wire and finally acts like ordinary connecting wire. d) It acts like a broken wire throughout the charging process. A real battery with internal resistance r = 5.0 Ohm is connected to a circuit with a resistive load of R = 150 Ohm as shown in the diagram. If the voltage across the terminals of the battery (labeled A and B) is 12.0 V. what is the power dissipated by the resistive load? a) 0.80 W b) 0.96 W c) 0.59 W d) 0.75 W A dielectric material is inserted between the plates of a charged capacitor. Which of the followings statements about the effects of the dielectric is TRUE? a) If the capacitor is not connected to a battery, the magnitude of the electric field between the plates increases. b) If the capacitor is not connected to a battery, the charge on the plates remains constant. c) If the capacitor is connected to a battery, the charge on the plates remains constant. d) If the capacitor is not connected to a battery, the voltage between the plates remains constant.

Explanation / Answer

Q = CV = 0.25×10^-6×12 = 3×10^-6 C which is 3uC

Since it is the top plate its charge will be negative so answer is -3uC (c)

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