Consider the circuit in the figure. 20 Ω 20 N 60 Ω 10 Q (a) Find the equivalent resistance of this combination of resistors. (b) Given that 400 mA of current flows in the 10 N resistor, find the emf of the battery. (c) Given that 400 mA of current flows in the 10 N resistor, find the potential difference across the 60 N resistor. wW ww

Consider the circuit in the figure. 20 Ω 20 N 60 Ω 10 Q (a) Find the equivalent resistance of this combination of resistors. (b) Given that 400 mA of current flows in the 10 N resistor, find the emf of the battery. (c) Given that 400 mA of current flows in the 10 N resistor, find the potential difference across the 60 N resistor. wW ww

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter10: Direct-current Circuits

Section: Chapter Questions

Problem 69AP: Consider the circuit below. The battery has an emf of = 30.00 V and an internal resistance of r =...

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Consider the circuit below. The battery has an emf of = 30.00 V and an internal resistance of r = 1,00 . (a) Find the equivalent resistance of the circuit and the current out of the battery. (b) Find the current through each resistor, (c) Find die potential drop across each resistor, (d) Find the power dissipated by each resistor, (e) Find the total power supplied by the batteries.
A child's electronic toy is supplied by three 1.58-V alkaline cells having internal resistances of 0.0200 inseries with a 1.53-V carbon-zinc dry cell having a 0.100- internal resistance. The load resistance is 10.0 . (a) Draw a circuit diagram of the toy and itsbatteries, (b) What current flows? (c) How much power is supplied to the load? (d) What is the internal resistance of the dry cell if it goes bad, resulting in only 0.500 W being supplied to the load?
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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 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?
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