Measurement And Instrumentation - Study Mode

[#151] The full-scale deflection current of an ammeter is 1 mA and its internal resistance is 100 ohms. This is to have full deflection when 100V is measured. What is the value of series resistor to be used?
Correct Answer

(A) 99.99 K ohms

[#152] A spring controlled indicating instrument has a deflection of 90° for maximum current I. The corresponding deflection for a gravity controlled instrument is
Correct Answer

(C) 30°

[#153] PMMC type instruments normally use
Correct Answer

(C) Eddy current damping

[#154] Jewels are used in instruments for the purpose of
Correct Answer

(D) Bearing

[#155] Which instrument has identical calibration for ac as well as dc values?
Correct Answer

(A) Hot wire type