Solution: At what point from A on the line AB will the intensity of illumination be least?

(Last Updated On: December 8, 2017)

At what point from A on the line AB will the intensity of illumination be least?

Problem Statement: EE Board October 1993

At any distance x from the source of light, the intensity of illumination varies directly as the intensity of the source and inversely as the square of x. Suppose that there is a light at A, and another at B, the one at B having an intensity 8 times that of A. The distance AB is 4 m. At what point from A on the line AB will the intensity of illumination be least?

  • A. 2.15 m
  • B. 1.33 m
  • C. 1.50 m
  • D. 1.92 m

Problem Answer:

At 1.50 m from A on the line AB will the intensity of illumination be least

Solution:

Latest Problem Solving in Differential Calculus (MAXIMA-MINIMA & TIME RATES)

div.feedburnerFeedBlock ul li {background: #E2F0FD;
list-style-type: none;
margin:0 0 5px 0px;
padding:5px 5px 5px 10px !important;
border: 1px solid #0080ff;
border-radius:8px;
-moz-border-radius:8px;
-webkit-border-radius:8px;
}

div.feedburnerFeedBlock ul li:hover {
background:#ffffff;
}

div.feedburnerFeedBlock ul li a{
color:#ffffff;
text-decoration:none;
}

div.feedburnerFeedBlock ul li a:hover {
text-decoration: underline;
color: #000000;
}
div #creditfooter{
display: none;
}

More Questions in: Differential Calculus (MAXIMA-MINIMA & TIME RATES)

Online Questions and Answers in Differential Calculus (MAXIMA-MINIMA & TIME RATES)

Solution: At what point from A on the line AB will the intensity of illumination be least?
Rate this:

Add Comment

© 2017 PinoyBIX Engineering. © 2017 All Rights Reserved | Donate
Basic Television – Grob TV Chapter Exercises
Series of Multiple Choice Questions in Engineering Mathematics
Complete Practice Quiz in Electronic Devices and Circuit Theory
Complete Practice Quiz in Data Communications and Networking
Online Tool: Color Code Conversions
Online Tool: Weight Measurement Conversions
Online Tool: Temperature Measurement Conversions
Online Tool: Length Measurement Conversions

Get FREE Review Course
in your inbox

Subscribe to our mailing list and get reviewers and updates to your email inbox.

Thank you for subscribing.

Something went wrong.