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Unformatted text preview: 4. When the switch on the circuit below is closed, current will flow around the circuit for a while before it stops. The rate of decline in current flow can be characterized by the time constant ( τ ) for the circuit. a. Given the following values, calculate the value of the conductor in this circuit: τ = 200 ms, C = 10 µF, E = 60 mV. b. Calculate V C when the current stops. c. Calculate I at 200 ms after the switch was closed. 5. One of the ways that neuroscientists study brain function is to measure the responsiveness of selected pathways to a current that is applied across the scalp; this is known as transcranial stimulation. If a stimulator has the capacity to develop a potential difference of 1.63 kV and the resistance across the scalp is 100 k Ω , what is the maximal current (mA) that can be delivered?...
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- Spring '07
- Electric charge, BOULDER Department of Integrative Physiology, specific membrane conductance