Physics

A 1-mile long wire has a resistance of 44 ohm. What will be its new resistance when it is shortened by cutting it in half (using only 1/2 of...

Posted by lkehoe March 26, 2013 at 3:56 PM via web. 2 educator answers. »

A doorbell requires a current of 0.4 A and 6 volts.  It is connected to a transformer with 2000 turns in the primary coil, which is plugged...

Posted by kylekasman April 4, 2012 at 6:38 AM via web. 1 educator answer. »

Why is a parallel circuit arrangement best for house wiring?

Posted by kylekasman February 29, 2012 at 12:48 AM via web. 1 educator answer. »

Which are the most conductive and least conductive metals?

Posted by jasseb November 4, 2011 at 11:17 AM via web. 1 educator answer. »

A person with body resistance between his hands of 10KΩ accidentally grasps the terminal of a 14-KV power supply.If the internal resistance...

Posted by spunkykhan June 11, 2011 at 6:38 PM via web. 1 educator answer. »

Can a 3 volt battery light up a 1.5 volt bulb?

Posted by baeksungjo March 2, 2011 at 6:14 AM via web. 1 educator answer. »

What is the voltage Vout in the circuit displayed in the following figure?For R = 11 k Ω calculate the voltage Vout of the potential divider...

Posted by adolphina January 29, 2011 at 4:46 AM via web. Be the first to answer. »

Why are dielectric materials used in capacitors?

Posted by airhead996 November 28, 2010 at 4:40 PM via web. 1 educator answer. »

Why are we protected from lightning sitting in our cars?  

Posted by beatrice0866 November 27, 2010 at 4:01 PM via web. 1 educator answer. »

Protons are released from rest in a Van de Graaff accelerator system.The protons initially are located where the electric potential has a...

Posted by foobar33 July 8, 2010 at 8:07 AM via web. Be the first to answer. »