Rohan Khan

A person with body resistance between his hands of 10KÙ accidently grasps the terminal of a 14-KV power supply.
(a) If the internal resistance of the power supply is 2000Ù, what is the current through the person’s body?
(b) What is the power dissipated in his body?
(c) 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 above situation to be 1.00mA or less?

  1. 👍 0
  2. 👎 0
  3. 👁 493
  1. (a) I = V/R
    where R = Rb + Ri
    = (10 + 2)*10^3 = 12,000 ohms

    Rb = body resistance
    Ri = power supply internal resistance

    (b) I^2*Rb

    (c) Require that V/(Rb + Ri) < 10^-3 A
    Solve for Ri

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    The outstretched hands and arms of a figure skater preparing for a spin can be considered a slender rod pivoting about an axis through its center. When the skater's hands and arms are brought in and wrapped around his body to

    asked by Erin on April 12, 2008
  2. Physics

    A 580-g squirrel with a surface area of 855 cm2 falls from a 5.2-m tree to the ground. Estimate its terminal velocity. (Use the drag coefficient for a horizontal skydiver. Assume that the cross-sectional area of the squirrel can

    asked by Anonymous on June 1, 2016
  3. Physics

    Air resistance acting on a falling body can be taken into account by the approximate relation for the acceleration: a= dv/dt = g - kv, where k is a constant. (a) Derive a formula for the velocity of the body as a function of time

    asked by Rose on September 26, 2013
  4. 7th grade health Ms. Sue please thanks

    True/False Indicate whether the statement is true or false. 11. A person with good self-esteem is willing to try new things. (1 point) True False 12. Stress can be positive or negative. (1 point) True False 13. Giving away prized

    asked by Delilah on December 12, 2012
  1. Physics

    A 580-g squirrel with a surface area of 855 cm2 falls from a 5.2-m tree to the ground. Estimate its terminal velocity. (Use the drag coefficient for a horizontal skydiver. Assume that the cross-sectional area of the squirrel can

    asked by Anonymous on June 1, 2016
  2. physics

    A 60 kg skydiver moving at terminal speed falls 50 m in 1 sec. What power is the skydiver expending on the air? The terminal speed of the falling object is the maximum constant speed the object will reach due to the opposing force

    asked by pakilina on November 3, 2011
  3. physics, PLEASE ANSWER, I really need help!

    The basal metabolic rate is the rate at which energy is produced in the body when a person is at rest. A 70.0 kg person of height 1.79 m would have a body surface area of approximately 1.90 m^2. What is the net amount of heat this

    asked by AE on December 6, 2009
  4. Business Communications

    I wanted to welcome you ASAP to our little family here in the States. It's high time we shook hands in person and not just across the sea. I'm pleased as punch about getting to know you all, and I for one will do my level best to

    asked by Heather on October 7, 2006
  1. physics Elena please verify

    If the resistance between the center and the outer terminal on a 20 k ohm potentiometer reads 12 k ohms, the resistance between the center terminal and the other outer terminal is i have 12kohms

    asked by Adam on May 31, 2013
  2. Physic

    A person weighs 872 N in air and has a body fat percentage of 20.7%. a. What is the overall density of this person's body? b. What is the volume of this person's body? c. Find the apparent weight of this person when completely

    asked by Ann on April 18, 2010
  3. Health (Ms. Sue)--Is my answer correct?

    Compare the ways that HIV can and cannot be transmitted. A: 6. HIV can be spread in many ways that involves physical contact that can result in the virus being led into a person’s body. Such ways include sexual activity with an

    asked by Anonymous on January 3, 2014
  4. physics

    a body is thrown vertically upward return to the earth in 3sec. (a)what was the initial velocity of the body (b)what height did the body reach? neglect the resistance of air.

    asked by pavatharani on June 14, 2011

You can view more similar questions or ask a new question.