Why is the core of a moving coil galvanometer taken as a soft iron cylinder?
What is current sensitivity of a moving coil galvanometer? The core of a moving coil galvanometer is made of soft iron, why?
What is difference between moving coil and moving iron ammeter? What is the difference between moving-iron and moving-coil instruments? Why does a current carrying coil produce magnetic field? What is the reason for the presence of a single coil and inductor coil in the wattmeter? What is a galvanometer and how is it used? What is a magnetometer sensor? How is flux produced in a coil? Why moving iron instruments work on AC and DC supply both but moving coil instruments work only in DC supply only ?  What is a ballistic galvanometer? How are galvanometers used? An electric iron has a rating of 750W , 220V. Calculate the current passing through it and its resistance when in use? What is the accuracy of a galvanometer? How accurate is a galvanometer? Uses of galvanometer? How does a pressure gauge works? How does a pressure gauge work? Differentiate primary coil from the secondary coil of a transformer? Why moving iron instrument is used for both ac and dc? What is ballistics galvanometer? Why is current due to the motion of the negatively charged electrons? How does a speed sensor work on a treadmill? Why electric coil draws overcurrent? Why are speedometers inaccurate? Why moving iron instruments are used on AC and DC supply both? How does a current-carrying conductor produce a magnetic field when made into a coil? What is the driving force for (a) heat transfer, (b) electric current flow, and (c) fluid flow? In a magnetic crane, a powerful electromagnet is used to lift up the iron material. But when we pass a current through a conductor & bring iron filings near it, they are set in a form of concentric circles, instead of clinging to the conductor. Why? Electrical Engineering: What is a Tesla coil? What are its possible uses? Can it be used for wireless power transmission? What is the working mechanism in a speedometer in automobiles? How are voltmeters connected in a circuit (battery and resistor)?