Measurement And Instrumentation - Study Mode

[#156] The full-scale deflection current of an ammeter is 1 mA and its internal resistance is 100 ohms. If this meter is to have full deflection at 5A, what is the value of the shunt resistance to be used?
Correct Answer

(B) $$frac{1}{{49.99}}{ ext{ ohms}}$$

[#157] If the instrument is to have a wide range, the instrument should have
Correct Answer

(D) Logarithmic scale

[#158] It can be stated that
Correct Answer

(C) CT operates with considerably lower flux density than a PT

[#159] To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken
Correct Answer

(C) From the same source as the unknown voltage

[#160] With a sweep time 10ms across the screen the approx. horizontal sawtooth frequency will be
Correct Answer

(B) 100Hz