College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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- The filament in an incandescent light bulb is made from tungsten (resistivity 5.6 x 10-8 Q-m). The light bulb is plugged into a 120-V outlet and draws a current of 2.46 A. If the radius of the tungsten wire is 0.00404 mm, how long must the wire be? Number i Unitsarrow_forwardFor the circuit shown in the Figure, a 5.0A current is measured coming from the 60.0V EMF E. Find R and the current through the 3R resistor. Hint: find the equivalent resistance. R 2R m 3R www R ww R 15.0A 5.0 A 60 Varrow_forwardb. Fig. 2 shows the same filament lamp and a resistor of resistance 1.2 Q connected in series with a battery. The battery has e.m.f. 4.5 V and internal resistance r. The voltmeter has very high resistance. The current in the circuit is 2.0 A. 4.5V (i) Show, with the help of Fig. 1, 2.0A r that the voltmeter reading is 3.4 V. lamp 1.20 (ii) Calculate the internal resistance r of the battery. V Fia. 2arrow_forward
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- If the battery in the circuit below is 15.64V, resistor R1=349.44N, and resistor R2=284.012, what is the magnitude of the current flowing through the circuit? Please give your answer in units of milli-Amps (mA). R2 В I R1 A Note: It is understood that the unit of your answer is in milli-Amperes (mA), however do not explicitly includearrow_forwardplease answer vvvarrow_forwardIf the battery in the circuit below is 15.42V, resistor R₁=442.11, and resistor R₂-379.37, what is the magnitude of the current flowing through the circuit? Please give your answer in units of milli-Amps (mA). R₂ R₁ A B E Note: It is understood that the unit of your answer is in milli-Amperes (mA), however do not explicitly include units in your answer. Enter only a number. If you do enter a unit, your answer will be counted wrong.arrow_forward
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