Recent content by Magna1

So to get this figured out I just calculate Rt as a pair of Parallel resistors?

A galvonometer has a coil resitance of 460 ohms and a full scale deflection current of of 100^10*-6 A What shunt resistor is needed to convert this galv.. into an ammeter which has a full scale deflection current of 200 ^10*-3 A? What is the resitance of the ammeter when it is completed? What...

The Earth's magnetic field in this city points towards the north pole and downwards into the ground. The horizontal portion of the Earth's magnetic field is 12.5^10*-6 T and its angle of declination is 22.5 degrees(the angle east of north) What are the eastern components of the Earth's magnetiv...

Its been a rough week I have posted 3 times. A digital thermometer uses pure silicon thermistor as its sensing element. When it is used to measure the temp of a sick child the element drops to 99.06% of its normal value at standard body temp of 37 degrees. What is the temp of the sick child...

tex didn't work The wire is 5 ohms and we want to get it to 1/2 it's original diameter. the formula is R=[rho)*l(length)]/Area

I hate to ask for the answer on this one but the arguments are getting louder amongst us. Here is the ?? A wire has a resistance of [tex]5\Omega[\tex]. It is melted down and drwan into a new wire of [tex]\frac{1}{2}]the original diameter. What is the resistance of the new wire? Answer...

In that case 250AH x 3600=900 000 Then 900 000/300= 3000 A is the answer to the max current? I think that this is what you were talking about ... yes?

Lets see If I got this right 250 AH/60min = A/min x 5min= Amp@5min=20.83333 But 1c x 300secs= ? This again is a sticky point. What is the charge in Coulombs? Do I multiply 20.833 by something? Am I at least on the right train of thought?

A battery has a rating of 250AH What is the total amount of charge this battery can supply to a cct? And What is the max current this battery can provicde for 5 min? I don't know what formula's to use? I have C=QV I=q/t but I don't which ones to use or even worse where to apply for these

Thanks Hopefuly that was it. Cause I went into my test today with the way I was doing it, Forget the book maybe I should just ask you guys. Thanks

THe question is. How many electrons must be transferred to a body to give it a negative charge of 4.00nC.?/ So going with what I think 4*10^-9/1.602189...*10^-19= =25*10^9. BUT the answer in my book. is 390*10^-9. What am I missing. Is this negative thing screwing me up or is the answer in...

Two questions. 1. a negative lightning bolt delivers a 15C charge from the ground to the BASE of a thunder cloud (Vpd = 5.0GV) 2. A positive lightning bolt delivers 20Ccharge from the Top of a thunder storm cloud to the ground (Vpd=30GV). Both questions ask how much work is done to move...

Thats the problem then isn't it. The minority is never asked. We only care about the rich and famous. Some even say give true communism a try and you will have a larger majority housed, fed, employed, and posibly even happier. I think that This question has to be asked with one eye closed...

and then? I figured out the F due to Gravity (Fg. I used the E and found the charge on Q. but how do I tie the 2 numbers together? I figured out the Fg by using the density=m/v but once again How do I put the two numbers together? "Learning Never Stops"

Don't know where to go Get stuck at every corner. Here it is "A small droplet of oil of 50^10*-6m radius is sitting inside of an electric field 500^10*3 N/C which is pointing straight up. What must be the charge on the oil droplet so that the electrostatic force cancels out due to gravity? The...