Current Balance

current balance

[′kər·ənt ‚bal·əns]
An apparatus with which force is measured between current-carrying conductors, with the purpose of assigning the value of the ampere. Also known as ampere balance.

Current Balance


(or ampere balance), a device used to reproduce the unit of electric current, the ampere. The design of the current balance is similar to that of an analytic balance, except that a current balance is made of nonmagnetic materials. The current is determined from the force of the electrodynamic interaction between two conductors in the form of coaxial single-layer solenoids, through which the same current is flowing. The force of interaction between the solenoids is counterbalanced by the weights, according to the equation Current Balance, where I is the current, m is the mass of the weights, g is the acceleration of free fall, and k is a coefficient that depends on the dimensions of the solenoids and takes into account the properties of interaction of the solenoids compared to the interaction of rectilinear conductors. To counterbalance the weights in the absence of a current flow, a solenoid is suspended from the arm of the balance that carries the weights. This solenoid is identical to the movable solenoid, but no current flows through it.

In the USSR the current balance is used as the state standard for measurement of electric currents. The error of a current balance is about 0.001 percent.


Tiurin, N. I. Vpoiskakh tochnosti, 2nd ed. Moscow, 1960.
Burdun, G. D., and B. N. Markov. Osnovy metrologii. Moscow, 1972.
References in periodicals archive ?
Overall Fitch expects that the current balance will remain positive over the medium term, at 5%-7% of current revenue.
Dr Madigele said the current balance was P12 million as there had not been any disbursement as yet.
A House leader on Wednesday called on the Bureau of Treasury (BTr) to account for the P25-billion discrepancy in the current balance of the controversial Malampaya fund per its status reports and account books.
The transaction includes the management contracts with Club Intrawest, the current balance of notes receivable, approximately four acres of undeveloped land, and the current balance of points available for sale.
The IMF also approved a waiver of non-observance of a performance criterion on the current balance of the public electricity sector for end-June 2011; waivers of applicability of the relevant end-June 2011 performance criteria; and modification to performance criteria on the current balance of the public electricity sector and the net domestic assets of the Central Bank for end-September and end- December 2011;
Summary: TEHRAN (FNA)- A Senior Iranian oil official predicted that the current balance between supply and demand in oil market will continue during the next 6 months.
Apparently the fair-share argument only applies to things that don't threaten the current balance of power.
This dynamic would be far more inclusive with respect to definitional items as opposed to, say, the current balance of payments calculations.
Your current balance is displayed as you pay bills online.
Droop accuracy, phase current balance and over-current protection can be affected by temperature related changes in RDS(ON) or DCR.
The CSRS fund, which covers employees who joined the agency before 1983, has a current balance of $151.
What's more, you can find a client's current balance due, going back as far as five years.