A \"current balance\" is constructed to measure the force between a solenoid wit
ID: 2241872 • Letter: A
Question
A "current balance" is constructed to measure the force between a solenoid with n = 1.0
A "current balance" is constructed to measure the force between a solenoid with n = 1.0 times 104 turns per meter and a 5.0 cm long straight wire segment carrying equal current passing though the solenoid (in between two adjacent turns) perpendicular to the solenoid's axis. When current flows, the solenoid's field pulls the wire down. This wire is connected to one side of the balance, while mass is placed on the other side. What mass is necessary for equilbrium when the current through the device is 1.0 A?Explanation / Answer
mg = iLB
againn B = uoni
with n = N/L = 10000
so m = iLB/g
=4pi *10^-7 * 10000* 1*1* *0.05/(9.8)
= 6.4 *10^-5 kg
= 0.064 gms
=64 mg