Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 25, Problem 73P
To determine
Resistance of the smallest resistor that can be put in series with power supply.
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Chapter 25 Solutions
Physics for Scientists and Engineers
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- The power dissipated in a resistor is given by P = V2/R, which means power decreases if resistance increases. Yet this power is also given by P = I2R, which means power increases if resistance increases. Explain why there is no contradiction here.arrow_forwardPower P0 = I0 V0 is delivered to a resistor of resistance R0. If the resistance is doubled (Rnew = 2R0) while the voltage is adjusted such that the current is constant, what are the ratios (a) Pnew/P0 and (b) Vnew/V0? If, instead, the resistance is held constant while Pnew = 2P0, what are the ratios (c) Vnew/V0, and (d) Inew/I0?arrow_forwardA 0.50-W, 220- resistor carries the maximumcurrent possible without damaging the resistor. If the current were reduced to half the value, what would be the power consumed?arrow_forward
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- Power P0 = I0 ∆V0 is delivered to a resistor of resistance R0.If the resistance is doubled (Rnew = 2R0) while the voltageis adjusted such that the current is constant, what are theratios (a) Pnew /P0 and (b) ∆Vnew /∆V0? If, instead, the resistanceis held constant while Pnew = 2P0, what are the ratios(c) ∆Vnew /∆V0 , and (d) Inew /I0 ?arrow_forwardThe circuit shows R= 1 ohm, Emf1= 12.2 V and Emf 2= 7.1 V. What is the power delivered to the 10R resistor in W? Note: 1.0857 is the correct answer. Show.arrow_forwardAn RC circuit has a 5.5 kΩ resistor and a 8.0 µF capacitor in series, how long will ittake for the fully discharged capacitor to be charged to 95% once the switch is closed? _______How long would it if a second 8.0 µF capacitor is added in series? _______arrow_forward
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