Problem: A heart pacemaker fires exactly 69 times a minute, each time a 29.0 nF capacitor is charged (by a battery in series with a resistor) to 0.732 of its full voltage. What is the value of the resistance?

FREE Expert Solution

In this problem, we will find the value of resistance from the expression of voltage across a charged capacitor, which is expressed as:

V=V0(1-e-tRC)

The voltage, V  = 0.732V0

We get time taken by the heart pacemaker to fire once as:

t = 1min/69 = 60s/69 = 0.8696 s

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Problem Details

A heart pacemaker fires exactly 69 times a minute, each time a 29.0 nF capacitor is charged (by a battery in series with a resistor) to 0.732 of its full voltage. What is the value of the resistance?

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