Download the App!

Get 24/7 study help with the Numerade app for iOS and Android! Enter your email for an invite.

Get the answer to your homework problem.

Try Numerade free for 7 days

Like

Report

A person with body resistance between his hands of 10.0 $\mathrm{k} \Omega$ accidentally grasps the terminals of a $20.0-\mathrm{kV}$ power supply. (Do NOT do this!) (a) Draw a circuit diagram to represent the situation. (b) If the internal resistance of the power supply is $2000 \Omega,$ what is the current through his body? (c) What is the power dissipated in his body? (d) 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? (e) Will this modification compromise the effectiveness of the power supply for driving low-resistance devices? Explain your reasoning.

see the solution

Physics 102 Electricity and Magnetism

Chapter 21

Circuits, Bioelectricity, and DC Instruments

Direct-Current Circuits

Cornell University

Rutgers, The State University of New Jersey

University of Washington

Hope College

Lectures

11:53

In physics, a charge is a …

10:30

The electric force is a ph…

05:33

A person with body resista…

02:48

Electricity through the bo…

05:49

A 1.00 -M\Omega voltmeter …

02:50

A $0.020-\Omega$ ammeter i…

03:26

05:11

The circuit in Figure $\ma…

03:57

A 0.0200- 2 ammeter is pla…

09:14

Power Rating of a Resistor…

02:07

BIO Electric currents in t…

05:22

04:01

Three $100-\Omega$ resisto…

03:59

A circuit consists of a se…

05:13

Suppose that a person'…

01:56

Consider the circuit in th…

13:04

Consider the circuit shown…

01:41

The average bulk resistivi…

02:12

Power rating of a resistor…

00:25

In the physics laboratory,…

04:41

So in this problem, uh, we have the battery with ah e m f Equal v and we also have the internal resistance and it is connected with the human body, and the human body here is treated as the extent of resistance. Okay, so there's the r and there's more and the so there's a part Ay, and in part B. So we obtained information that V is the 20 kibbles and Ari's turn Katie Holmes and the smaller is 2000 homes. So the current of this ah circuit is being devoured by our plants are right. So this gives you 1.67 peers and in part, see, So the power that they divert into the human body is Ah ah, I squared. Times are were eyes that one we found here. So this is the 2.8 times 10 to the fourth warts, All right. And in part d. So to prevent Ah, this ah situation happening, we actually we can increase the internal resistance of this battery. So, uh, to reach this bet to reach a safety value uh, we're the current is ah should be smaller. Oh, equal. Want them? 1,000,000 peers. So we have ah, current equal VD by by our plus r right. So this one should be smaller, the equal one ah, than 1,000,000 peers. So we camped in that are ah, actually greater is greater or equal than, ah all equal to lead you out. But I minus R So we already have the vetting for Be right these 20 kiddo Bronchial waltz and the current, uh, here we just said Current is one medium peers and our is ah are 10 kingdoms. So we can we can obtain the solution for this more. So this is 1.999 times 10 to the seventh owns all right, and the in parts E So suppose we replaced the internal resistance with this are equal 1.999 times 10 to 7 Selves. So what were changed for the appliance that we apply on this a circuit So initially we know that Ah ah, the internal resistance is 2000 volts. Right? So basically we have this e m f and this more is that 2000 homes. So suppose we have appliance with the extent of resistance equal 2000 homes, all right so we can calculate the power acting on this appliance. Soapy ihsaa Ah, I split times are were the current in the circuit is vey good Bye bye are plus our and square times are so in this equation v ihsaa so obvious that 20 kilovolts and our is this 1 2000 homes a smaller is also the with 2000 homes. So you can find the video is that 50 kid awards? So suppose this is a standard power that to use down this appliance and now it will replace this more. Was this better? What happened? So the new power will become my square times are equal vt bye bye are plus our It's the same equation however you need to So So I mean the V here it's still 22 votes and the capture our is 2000 homes by smart. You need to replace us more with this very so you can actually see that the value is five times 10 to the native seventh Waltz. So compare with the video above you You would you can see clearly that the power on this one is there. It's almost zero. So it is Ah, it will replace the internal resistance with this so called safety internal resistance. Uh, is, uh, it is under our It is on the standard of power that we need, Okay.

View More Answers From This Book

Find Another Textbook

In physics, a charge is a physical property of matter that causes it to expe…

The electric force is a physical force exerted by electrically charged parti…

A person with body resistance between his hands of 10 k$\Omega$ accidentally…

Electricity through the body, I. A person with a body resistance of 10 $\mat…

A 1.00 -M\Omega voltmeter is placed in parallel with a 75.0 -k $\Omega$ resi…

A $0.020-\Omega$ ammeter is placed in series with a $10.00-\Omega$ resistor …

Electricity through the body, II. The average bulk resistivity of the human …

The circuit in Figure $\mathrm{P} 28.40 \mathrm{a}$ consists of three resist…

A 0.0200- 2 ammeter is placed in series with a $10.00-\Omega$ resistor in a …

Power Rating of a Resistor. The power rating of a resistor is the maximum po…

BIO Electric currents in the body A person accidentally touches a 120 - V el…

Three $100-\Omega$ resistors are connected as shown in Figure P28.7. The max…

A circuit consists of a series combination of 6.00-k$\Omega$ and 5.00-k$\Ome…

Suppose that a person's body resistance is 950$\Omega$ (a) What current…

Three $100-\Omega$ resistors are connected as shown in Figure P28.11. The ma…

Consider the circuit in the diagram. (a) Draw the simplest equivalent circui…

Consider the circuit shown in Figure P 18.10. (a) Calculate the equivalent r…

The average bulk resistivity of the human body (apart from surface resistanc…

Power rating of a resistor. The power rating of a resistor is the maximum po…

In the physics laboratory, Oscar measured the resistance between his hands t…

Suppose that a person's body resistance is 950 $\Omega$ (moist skin). (…

03:13

(a)What is the capacitance of a parallel plate capacitor having plates of ar…

01:13

Your $R L$ circuit has a characteristic time constant of 20.0 ns, and a resi…

02:19

How much of a single-stage rocket that is $100,000 \mathrm{kg}$ can be anyth…

03:24

When a person sits erect, increasing the vertical position of their brain by…

05:00

Thermography is a technique for measuring radiant heat and detecting variati…

03:42

(a) Find the intensity in watts per meter squared of a 60.0-Hz sound having …

00:56

What is the value of the magnetic flux at coil 2 in Figure 23.56 due to coil…

03:03

Show that when light reflects from two mirrors that meet each other at a rig…

00:51

When the 20.0 A current through an inductor is turned off in 1.50 ms, an 800…

01:32

At what speed must the sliding rod in Figure 23.11 move to produce an emf of…