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University Physics | 13th Edition | ISBN: 9780321675460 | Authors: Hugh D. Young, Roger A. Freedman
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What physical phenomena (other than a pendulum or cesium

Chapter 1, Problem 7DQ

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QUESTION:

A power supply has a fixed output voltage of \(12.0 \mathrm{~V}\), but you need \(V_{\mathrm{T}}=3.0 \mathrm{~V}\) for an experiment.  (a) Using the voltage divider shown in Fig. 19-66, what should \(R_2\) be if \(R_1\) is \(10.0 \Omega\) ?  (b) What will the terminal voltage \(V_{\mathrm{T}}\) be if you connect a load to the \(3.0-\mathrm{V}\) terminal, assuming the load has a resistance of \(7.0 \Omega\) ?

                                                                     

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QUESTION:

A power supply has a fixed output voltage of \(12.0 \mathrm{~V}\), but you need \(V_{\mathrm{T}}=3.0 \mathrm{~V}\) for an experiment.  (a) Using the voltage divider shown in Fig. 19-66, what should \(R_2\) be if \(R_1\) is \(10.0 \Omega\) ?  (b) What will the terminal voltage \(V_{\mathrm{T}}\) be if you connect a load to the \(3.0-\mathrm{V}\) terminal, assuming the load has a resistance of \(7.0 \Omega\) ?

                                                                     

ANSWER:

Solution 7DQ Rotation of Earth may be used to define th

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