23) In Fleming's Right Hand rule, the thumb points towards
Answer is:
direction of motion of conductor, if fore finger points along the lines of flux
Related RRB JE Mechanical Question Paper 2014 (Set-1) with Answer Key
Answer is:
Calibrating instrument
Explanation:
A potentiometer is an instrument for measuring voltage by comparison of an unknown voltage with a known reference voltage.
The unknown voltage may be supplied by a standard cell or any other known voltage.
The potentiometer is extensively used for calibrations of voltmeter and ammeters and has, in fact, become the standard for the calibration of these instruments.