Problem 3: Obtain a capacitor and set up the circuit shown in the diagram to the right, consisting of a battery, a switch, a bulb and a capacitor. A capacitor is simply two metal plates with an insulator in between. Explain what happens in terms of concepts you have learned in Units 1-5, such as charges, electric field, electric forces, potential difference, etc. Observe what happens when the switch is closed.
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Initially, the switch is open, and the capacitor is uncharged. There is no electric field between the plates, and the potential difference across the capacitor is zero. Show more…
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For the circuit shown the battery is in volts, resistance is in ohms, and capacitance is in microfarads. The capacitors are uncharged and the switch is then closed at t = 0. Put all answers in the table. - Describe what happens after the switch is closed. - Determine the current in the 4 ̩ resistor just after the switch is closed. - After a very long time, find the potential difference (voltage) across the 10 μF capacitor. - After a long time what is the current flowing through the 2 ̩ resistor?
Madhur L.
1 Consider the circuit below, with known values of R, C, and ε. Initially both switches are open and the capacitors have no charge. [Note that this circuit has been drawn to maximally obfuscate what is going on and it will be helpful to redraw it:] Switch SA is closed. What are the currents I1, I2 and I3 just after the switch is closed? (b) You wait long time after SA is closed and then examine the circuit. What are the voltages and charges on each capacitor? (c) Now the switch SB is closed: What are the voltages and charges on each capacitor after SB has been closed for long time? I3 SA R 12 R I1 SB
Shyam P.
You connect a battery, resistor, and capacitor as in (Figure 1), where R = 17.0 ̧̉ and C = 4.00 x 10^-6 F. The switch S is closed at t = 0. When the current in the circuit has magnitude 3.00 A, the charge on the capacitor is 40.0 x 10^-6 C. Part A What is the emf of the battery? Express your answer with the appropriate units. Part B At what time t after the switch is closed is the charge on the capacitor equal to 40.0 x 10^-6 C?
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