A person with a body resistance of 10 kΩkΩ between his hands accidentally grasps the terminals of a 14.0 kVkV power supply. If the power supply is to be made safe by increasing its internal resistance, what should the internal resistance be for the maximum current in the situation just described to be 1.25 mAmA or less?

A person with a body resistance of 10 kΩkΩ between his hands accidentally grasps the terminals of a 14.0 kVkV power supply. If the power supply is to be made safe by increasing its internal resistance, what should the internal resistance be for the maximum current in the situation just described to be 1.25 mAmA or less?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter29: Direct Current (dc) Circuits

Section: Chapter Questions

Problem 19PQ

See similar textbooks

Similar questions

Explain why R=R0(1 + a?T) for the temperature variation of the resistance R of an object is not as accurate as P=P0(1 + a?T) which gives the temperature variation of resistivity P.
If the terminals of a battery with zero internal resistance are connected across two identical resistors in series, the total power delivered by the battery is 8.00 W. If the same battery is connected across the same resistors in parallel, what is the total power delivered by the battery? (a) 16.0 W (b) 32.0 W (c) 2.00 W (d) 4.00 W (e) none of those answers
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?
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?
When the switch is open in Figure 18.8, power Po is delivered to the resistor R1. When the switch is closed, which of the following is true about the power Pc delivered to R1? (Neglect the internal resistance of the battery.) (a) Pc Po (b) Pc = Po (c) Pc Po Figure 18.8 (Quick Quizzes 18.5 and 18.6)
A 12.0-V emf automobile battery has a terminal voltage of 16.0 V when being charged by a current of 10.0 A. (a) What is the battery’s internal resistance? (b) What power is dissipated inside the battery? (c) At what rate (in °C/min ) will its temperature increase if its mass is 20.0 kg and it has a specific heat of 0.300 kcal/kg • °C, assuming no heat escapes?
A circuit loop containing an external resistor of value R = 25.0 (ohms) is connected to a real battery with an internal emf = 20.0 V that has an internal resistance of R = 1.50 (ohms). How much power is generated by the power supply in Watts?
A person with body resistance between his hands of 10.0 kΩ accidentally grasps the terminals of a 20.0-kV power supply. (Do NOT do this!) If the internal resistance of the power supply is 2000Ω , what is the current through his body?
During surgery, a current as small as 20.0 µA applied directly to the heart may cause ventricular fibrillation. If the resistance of the exposed heart is 253 Ω, what is the smallest voltage (in mV) that poses this danger?
In (Figure 1), the battery has negligible internal resistance and EMF = 44.0 V. R1 = R2 = 3.40 Ω and R4 = 3.70 Ω. What must the resistance R3 be for the resistor network to dissipate electrical energy at a rate of 275 WW?
Person with body resistance between his hands of 10.0 kΩ accidentally grasps the terminals of a 20.0-kV power supply. (Do NOT do this!) If the power supply is to be made safe by increasing its internal resistance, what should the internal resistance be for the maximum current in this situation to be 1.00 mA or less?
On three separate instances you connect each lightbulb to a battery with an emf of 12.00 V and an internal resistance of 0.5 Ω. When a current of 4 A passes through the battery, what is the resistance in the LED, CFL (compact fluorescent light) and incandescent lightbulbs?