Electrical Measuring Instruments | Practice MCQs Physics for Mdcat

A Wheatstone bridge B Potentiometer C Neither a) nor b) D Both a) and b)

A It has a long wire B It uses a sensitive galvanometer C It does not disturb the p.d. it measures D Both a) and b) are true

A Five wires potentiometer is better than ten wires B Ten wires potentiometer is better than four wires C Both a) and b) have similar merits D Both a) and b) is good

A Increasing the e.m.f. of cell B Increasing the length of the potentiometer wire C Decreasing the length of the wire of potentiometer D None of the above

A The voltmeter has high resistance B The resistance of the potentiometer wire is quite low C The potentiometer does not draw any current from the unknown source of e.m.f. to be measured D The sensitivity of potentiometer is higher than that of the voltmeter

A At null point no current flows in the potentiometer wire B At null point no current flows in the main circuit C At null point no current flows in the secondary circuit D None of the above

A Only two ratio arms fixed in it B All the four ratio arms fixed in it C Three ratio arms fixed in it D Both a) and b) are true