Capacitors

Wednesday, 5 September 2018

8:54 PM

Machine generated alternative text: A capacitor witn capacitance 1 _ 18 mF has a voltage of 4.99 V applied across it. What is the charge on the positive plate? 5.89+3 Well done. use the formula C c = Q/V This charged capacitor is now unplugged from the power supply without being discharged and plugged across a second uncharged capacitor with a capacitance of 2.34 mF, so that the positive and negative plates are connected. It a voltmeter is now used to measure the voltage across the first capacitor what value will it measure? 1.67 Well done'

 

Machine generated alternative text: You nave three capacitors, capacitor 1 has a capacitance 3.40 mF, capacitor 2 has capacitance 4.26 mF and capacitor 3 has a capacitance ot &48 ms Calculate the capacitance ot the circuit in the following contigurations: Configuration 1 (all in series): 1.46 mF

 

Machine generated alternative text: Configuration 2 (all in parallel): 14.1 mF

 

Machine generated alternative text: Configuration 3 (capacitor 1 in parallel witn capacitors 2 and 3 in series): c- 5.97

 

Machine generated alternative text: The grapn of potential difference (in volts) versus time (in seconds) across a charging capacitor is plotted below. It is a straight line with the equation V be a steady 6.07 mA. What is the capacitance of the capacitor? t 0.506 The slope of a voltage time grapn across a charging capacitor is given by current/capacitance_ = 11.99 t . The current is measured to

 

Machine generated alternative text: As pan ot this experiment you are going to need to wire up a circuit witn C3 in parallel with Cl and C2 in series. Complete the circuit diagram below to snow a possible configuration tor this circuit. You will need to measure the current arriving at the capacitors (before they are tully charged) and the voltage across capacitor C2. Drag and drop the components at the bottom to the appropriate place on the circuit diagram. Your answer is correct

 

Machine generated alternative text: You measure the capacitance of two capacitors witn uncertainties, Cl = What is the uncertainty in the value tor A? (1394 ± 22) ane = (800 ± 12) PE You connect these capacitors in series. 11.3e-6 1/pF (3 sig. tig.) Note: this ts asking for just the uncertainty, not the value, only enter the uncertainty into the box Well done' What is the uncertainty in the value of -L + X? 30.1+6 1/uF (3 sig. fig.) Well done What is the uncertainty in the equivalent capacitance when Cl and C2 are connected in series? Give your answer to the nearest whole number as you would present the value of the equivalent capacitance to 3 significant figures, so the uncertainty should be given to the nearest whole number. 8 Well done

 

 

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