Holooly Plus Logo
Holooly Plus Logo

Question 9.20: A patient in a medical laboratory has a muscle stimulator at...

A patient in a medical laboratory has a muscle stimulator attached to her left forearm. Her heart rate is being monitored by an EKG machine with two differential electrodes over the heart and the ground electrode attached to her right ankle. This activity is illustrated in Fig. 9.30a. The stimulator acts as a current source that drives 150 mA through the muscle from the active electrode to the passive electrode. If the laboratory technician mistakenly decides to connect the passive electrode of the stimulator to the ground electrode of the EKG system to achieve a common ground, is there any risk?

The "Step-by-Step Explanation" refers to a detailed and sequential breakdown of the solution or reasoning behind the answer. This comprehensive explanation walks through each step of the answer, offering you clarity and understanding.
Our explanations are based on the best information we have, but they may not always be right or fit every situation.
The Blue Check Mark means that this solution has been answered and checked by an expert. This guarantees that the final answer is accurate.
Learn more on how we answer questions.

This Question has been Answered.

Subscribe

Already have an account?

Login

Related Answered Questions

We wish to compute the rms value of the voltage waveform shown in Fig. 9.10.

Verified Answer:
The waveform is periodic with period T = 3 s. The ...

Most clothes dryers operate from a 240- V rms outlet and have several temperature settings, such as low, medium, and high. Let’s examine the manner in which the dryer creates heat for drying and the way in which it regulates the temperature.

Verified Answer:
First we will consider the heat itself. A simple m...

A light-duty commercial single-phase three-wire 60-Hz circuit serves lighting, heating, and motor loads, as shown in Fig. 9.38a. Lighting and heating loads are essentially pure resistance and, hence, unity power factor (pf), whereas motor loads have lagging pf. We wish to design a balanced

Verified Answer:
a. The magnitudes of the rms currents are I...

While sitting in a house reading a book, we notice that every time the air conditioner comes on, the lights momentarily dim. Let us investigate this phenomenon using the single-phase three-wire circuit shown in Fig. 9.36a and some typical current requirements for a 10,000-Btu/h air

Verified Answer:
[ h i n t ]: Technique 1. Find the resistance of t...

An electric lawn mower requires 12 A rms at 120 V rms but will operate down to 110 V rms without damage. At 110 V rms, the current draw is 13.1 A rms, as shown in Fig. 9.35. Give the maximum length extension cord that can be used with a 120-V rms power source if the extension cord is made from

Verified Answer:
The voltage drop across the extension cord is [lat...

For safety reasons the National Electrical Code restricts the circuit-breaker rating in a 120-V household lighting branch circuit to no more than 20 A. Furthermore, the code also requires a 25% safety margin for continuous-lighting loads. Under these conditions, let us determine the number of

Verified Answer:
The model for the branch circuit is shown in Fig. ...

While maneuvering in a muddy area, a crane operator accidentally touched a high-voltage line with the boom of the crane, as illustrated in Fig. 9.32a. The line potential was 7200 V. The neutral conductor was grounded at the pole. When the crane operator realized what had happened, he jumped

Verified Answer:
The conditions depicted in Fig. 9.32a can be model...

A cardiac care patient with a pacing electrode has ignored the hospital rules and is listening to a cheap stereo. The stereo has an amplified 60-Hz hum that is very annoying. The patient decides to dismantle the stereo partially in an attempt to eliminate the hum. In the process, while he

Verified Answer:
Let us suppose that the patient’s skin is damp and...

Two boys are playing basketball in their backyard. To cool off, they decide to jump into their pool. The pool has a vinyl lining, so the water is electrically insulated from the earth. Unknown to the boys, there is a ground fault in one of the pool lights. One boy jumps in and while standing in

Verified Answer:
The action in Fig. 9.29a is modeled as shown in Fi...

Suppose that a man is working on the roof of a mobile home with a hand drill. It is early in the day, the man is barefoot, and dew covers the mobile home. The ground prong on the electrical plug of the drill has been removed. Will the man be shocked if the “hot” electrical line shorts to the

Verified Answer:
To analyze this problem, we must construct a model...