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Chapter 21: Q16CQ (page 772)
Two different automobile batteries on a store shelf are rated at and “cold cranking amps.” Which has the smallest internal resistance?
the rated battery will have the smallest resistance.
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When making an ECG measurement, it is important to measure voltage variations over small time intervals. The time is limited by the \(RC\) constant of the circuit-it is not possible to measure time variations shorter than \(RC\). How would you manipulate \(R\) and \(C\) in the circuit to allow necessary measurements?
Find the resistance that must be placed in series with a \(10.0 - \Omega \) galvanometer having a \(100 - \mu A\) sensitivity to allow it to be used as a voltmeter with:
(a) a \(300 - V\) full-scale reading, and
(b) a \(0.300 - V\) full-scale reading.
When an unknown resistanceis placed in a Wheatstone bridge, it is possible to balance the bridge by adjusting to be . What is if?
Aemf automobile battery has a terminal voltage ofwhen being charged by a current of.(a) What is the battery’s internal resistance?(b) What power is dissipated inside the battery?(c) At what rate (in ºC/min) will its temperature increase if its mass isand it has a specific heat of, assuming no heat escapes?
Some light bulbs have three power settings (not including zero), obtained from multiple filaments that are individually switched and wired in parallel. What is the minimum number of filaments needed for three power settings?
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