A coffee maker is rated at 0.69 kW when connected to a 120 V source. (a) What current (in A) does the coffee maker carry? 690 How is the electric power related to the current and the electric potential difference? A (b) What is its resistance (in 0)? 57.5 How is the electric power related to the resistance and the electric potential difference? 0

A coffee maker is rated at 0.69 kW when connected to a 120 V source. (a) What current (in A) does the coffee maker carry? 690 How is the electric power related to the current and the electric potential difference? A (b) What is its resistance (in 0)? 57.5 How is the electric power related to the resistance and the electric potential difference? 0

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter28: Current And Resistance

Section: Chapter Questions

Problem 67PQ

See similar textbooks

Similar questions

A portable coffee heater supplies a potential difference of 12.0 V across a Nichrome heating clement with a resistance of 2.00 . (a) Calculate the power consumed by the heater. (b) How many minutes would it take to heat 1.00 kg of coffee from 20.0C to 50.0C with this heater? Coffee has a specific heat of 4 184J/(kg C). Neglect any energy losses to the environment.
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?
Integrated Concepts (a) What energy is dissipated by a lightning bolt having a 20,000-A current, a voltage of 1.00102 MV, and a length of 1.00 ms? (b) What mass of tree sap could be raised from 18.0°C to its boiling point and then evaporated by this energy, assuming sap has the same thermal characteristics as water?
Three identical 60.0-W, 120-V lightbulbs are connected across a 120-V power source as shown in Figure P28.72. Assuming the resistance of each lightbulb is constant (even though in reality the resistance might increase markedly with current), find (a) the total power supplied by the power source and (b) the potential difference across each lightbulb.
A 120 V potential difference is applied to a space heater whose resistance is 13.7 Ω when hot. At what rate is electrical energy being transferred to thermal energy? How much thermal energy is produced in 9.1 hours?
Given that V= J/A-s and 1 Kwh = 3.6 x106 J, what does it cost to operate a window-type air conditioning for one hour if the unit requires a 10-Amp current at 110V and electric energy costs 5 cents per Kwh? Compute the cost at 5.0 cents/Kwh of operating an electric motor that takes 15 Amp at 110V.
The potential difference across a resting neuron in thehuman body is about 75.0 mV and carries a current of about0.200 mA. How much power does the neuron release?
How much electrical energy is transferred to thermal energy in 2.50 hrs by an electrical resistance of 500 ohms when the potential applied across it is 80.0V? Express your answer in kJ.
How much electrical energy is transferred to thermal energy in 2.50 hrs by an electrical resistance of 500ohms when the potential applied across it is 80.0V?
What If? For what value of (in volts) will the current in the ammeter read 1.59 A?
In a cathode ray tube, electrons travel across a distance of 19.2 cm. Over this distance, the electric current is observed to be 18.5 μA over a time of 6.51 seconds. How many electrons traveled across this tube in this time?
A capacitor is charged by a steady current of 0.0012 A fro 25 seconds at which time its emf is 600 V. What is the energy stored in the capacitor?