Current Balance

current balance

[′kər·ənt ‚bal·əns]
(electricity)
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.

REFERENCES

Tiurin, N. I. Vpoiskakh tochnosti, 2nd ed. Moscow, 1960.
Burdun, G. D., and B. N. Markov. Osnovy metrologii. Moscow, 1972.
References in periodicals archive ?
Class Rating Original balance Current Balance Rating Action
Some thought that continuing to reinvest agency MBS principal payments in excess of $20 billion per month in agency MBS, as under the current balance sheet normalization plan, would simplify communications or provide a helpful backstop against scenarios in which large declines in long-term interest rates caused agency MBS prepayment speeds to increase sharply.
Fitch projects that in the medium term about 65% of capital expenditure will be financed by capital revenue, about 15% from the current balance, and the remainder by new debt.
This marks the largest net outflow of dollars from the economy since the $9.2-billion deficit recorded at the end of 2012, although the current balance of payments position may still widen or narrow depending on fund and trade flows for November and December.
The 2019 season will see three teams promoted and only one relegated in order to reverse the current balance of eight teams in the top flight and ten in Division Two.
Efstathiou told the inquiry that bankers had made the mistake of letting the account operate on current balance instead of available balance.
Nassar, yet, stressed the importance of promoting Egyptian exports to Sweden to cut a current balance of trade deficit.
Prepaid users will have the amount of the purchases deducted from their current balance.
The rise of oil prices in the past few weeks will translate into higher bunker costs, but not change the current balance in the market and thus freight rates.
Dr Madigele said the current balance was P12 million as there had not been any disbursement as yet.
The current Balance of Post office Insurance fund was Rs.