TESTfunda - CAT Question of the Day 02-Jan-12

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	02-Jan-12 TestFunda Home | Sign up for Newsletters | Feedback CAT Question of the Day Find the sum to first n groups of (1) + (1 + 5) + (1 + 5 + 25) + (1 + 5 +25 + 125) + …. OPTIONS     1)   2)   3)   4) None of these discuss | yesterday's solution | more questions Tip of the Day While solving the DI and QA sections, easy questions but with tedious calculations require prior attention. Do not leave them towards the end. more tips Last year's Question of the day (01-Jan-11) All non-superconducting materials offer some resistance and warm up when a current flows. Thus, proper design of an electrical conductor takes into account the temperature that the conductor needs to be able to endure without damage, as well as the quantity of electric current. The motion of charges also creates an electromagnetic field around the conductor that exerts a mechanical radial squeezing force on the conductor. A conductor of a given material and volume (length × cross-sectional area) has no real limit to the current it can carry without being destroyed as long as the heat generated by the resistive loss is removed and the conductor can withstand the radial forces. This effect is especially critical in printed circuits, where conductors are relatively small and close together, and inside an enclosure: the heat produced, if not properly removed, can cause fusing (melting) of the tracks. If T is the temperature, E is the quantity of the electric current, F is the radial squeezing force, V is the volume of the conductor, R is the resistance, then from the passage, we can conclude that: OPTIONS     1) T varies according to R, and is directly proportional to E, while being inversely proportional to F.   2) R leads to a loss of E, and F causes the T to shoot up.   3) In printed circuits, the higher the T, the lower the E.   4) If you use an insulator, there can be an unlimited amount of E passing through a conductor, provided there is no F.   5) None of the above discuss TestFunda.com - LEARN with THE LEADER in Online MBA Test Prep Demo Lessons   |   Take a Free Test   |   Buy Courses   |   Fun Learning Games   |   100-Percentilers About TestFunda.com - TestFunda is backed by www.ZeusLearning.com. 4 IIT-IIM graduates form the Management Team. - The 85+ member team has vast experience in MBA Coaching and Computer-Based Training and Testing. - For 9 years Zeus has created award-winning courseware for companies like Discovery Channel, Reader's Digest, Texas Instruments, Pearson Education. - The TestFunda Advisory Board comprises CEOs and MDs of international educational companies. About This Newsletter You received this email because you have registered with www.TestFunda.com. If you do not want to receive this email or want to sign up for other newsletters from TestFunda  click here. Please do not reply to this mail. Mails sent to this account will not be monitored. Post your comments and solutions under the Question of the Day forum. Problems getting this mail? To get this mail in your inbox, add noreply@testfunda.com to your contact list.       UNSUBSCRIBE / SUBSCRIBE | ABOUT | WHY TESTFUNDA | FAQ | PRIVACY | SUPPORT | CONTACT | DISCUSS   © Enabilon Learning Private Limited. All rights reserved