What is the purpose of the Wheatstone bridge circuit?

I - To measure the resistance of a strain gauge.
II - To measure the force applied to a load...

Question

What is the purpose of the Wheatstone bridge circuit?

I - To measure the resistance of a strain gauge.
II - To measure the force applied to a load cell.
III - To measure the voltage equivalent of Thévenin.
IV - To measure the power factor of an industrial electrical installation.
a) Only I and II are correct.
b) Only I, II and III are correct.
c) Only I and IV are correct.
d) All statements are correct.

Ed · Answer

O objetivo do circuito de ponte de Wheatstone é medir a resistência de um medidor de tensão (strain gauge) ou a força aplicada a uma célula de carga (load cell). Portanto, a alternativa correta é a letra a) "Apenas I e II estão corretas". As outras alternativas estão incorretas, pois o circuito de ponte de Wheatstone não é utilizado para medir a voltagem equivalente de Thévenin ou o fator de potência de uma instalação elétrica industrial.

What is the purpose of the Wheatstone bridge circuit? I - To measure the resistance of a strain gauge. II - To measure the force applied to a load...

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