Physics Laboratory Manual
4th Edition
ISBN: 9781133950639
Author: David Loyd
Publisher: Cengage Learning
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Chapter 32, Problem 5PLA
To determine
The factor to which a known emf and an unknown emf are compared to the voltage drop across the potentiometer.
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What is the emfx of a cell being measured in a potentiometer, if the standard cell’s emf is 12.0 V and the potentiometer balances for Rx = 5.000 Ω andRs = 2.500 Ω ?
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Physics Laboratory Manual
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- The figure shows an LED, protected by a resistor R, which is powered by a 9 Volt battery. If the power of the LED is 70 milliwatts and the voltage drop across the LED is 3.5 volts, determine the value of the resistor R in ohms that should be used in the circuit.arrow_forwardA heating element in a stove is designed to dissipate3.00 x 103 W when connected to 240. V. (a) Assuming theresistance is constant, calculate the current in the heatingelement if it is connected to 120. V. (b) Calculate the power itdissipates at that voltage.arrow_forwardIf a spherical capatictor, filled with Mica, is in a connected series with a resistor of 600kohms and a DC power source that has a max voltage of 30V, what would be the current in the RC circuit at 6ms. Given: inner radius = 20cm, outer radius = 20.01cm, and assume the capacitor is initially uncharged.arrow_forward
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