In the RC circuit below, Vs-8, R=49k2, and the capacitor =83 uF. if, initially, the switch is at position A and the capacitor is fully charged, what time, in seconds (to two decimal places), will it take V to reach 7 Volts after the switch is moved from position A to position B? Vs A B R

An RC circuit includes a basic switch, two voltmeters and an ammeter. Initially the capacitor is either partially or fully charged, and the switch is open. Data collection begins, and then the switch is moved to position "b" allowing the capacitor to begin discharging. Part 1: Which graph best represents the magnitude of the voltage measured across the capacitor by the voltmeter labeled Vc? O O t Part (a) Which graph best represents the charge on the positive plate of the capacitor as a function of time? O O O Vo O a o .b Part 2: Which graph best represents the magnitude of the voltage measured across the resistor by the voltmeter labeled VR? O Part (b) Which graph best represents the current measured with the ammeter as a function of time? O R t A I O Vc

If two resistors with resistances R1 and R2 are connected in parallel, then the total resistance R, measured in ohms (Ω), is given by 1/R =1/R1 + 1/R2. If R1 and R2 are increasing at rates of 0.3 Ω/s and 0.2 Ω/s, respectively, how fast (in Ω/s) is R changing when R1 = 80 Ω and R2 = 100 Ω?

In a heart pacemaker, a pulse is delivered to the heart 84 times per minute. The capacitor that controls this pulsing rate discharges through a resistance of 3.9 ✕ 106 Ω. One pulse is delivered every time the fully charged capacitor loses 63.2% of its original charge. What is the capacitance of the capacitor? F