What is the difference between moving-iron and moving-coil instruments?
What is difference between moving coil and moving iron ammeter?
Why is the core of a moving coil galvanometer taken as a soft iron cylinder? Why moving iron instruments work on AC and DC supply both but moving coil instruments work only in DC supply only ?  Why moving iron instrument is used for both ac and dc? What is current sensitivity of a moving coil galvanometer? The core of a moving coil galvanometer is made of soft iron, why? Why moving iron instruments are used on AC and DC supply both? What is the difference between an ammeter and a voltmeter? How hot does moving metal need to be to generate an electromagnetic field? What is the basic difference between inductor and coil? Why does a current carrying coil produce magnetic field? How is flux produced in a coil? What is the reason for the presence of a single coil and inductor coil in the wattmeter? An electric iron has a rating of 750W , 220V. Calculate the current passing through it and its resistance when in use? How does a coil in a magnetic field rotate through a full turn? Differentiate primary coil from the secondary coil of a transformer? Can we increase/decrease range of an ammeter? Why is an ammeter always connected in series and a voltmeter always in parallel in a circuit? How can the range of an ammeter be extended? What is the difference between electrode, filler metal and welding rod? How does a current-carrying conductor produce a magnetic field when made into a coil? If magnetic fields can't do work, how can one magnet physically move another? What is the difference between magnetic flux and magnetic flux linkage? 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 concentric manner, instead of clinging the conductor. Why? How does an electronic and a wire transfer differ? 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? Theory of 3 ammeter method? Why electric coil draws overcurrent? What is the use of tesla coil? What is a magnetometer sensor? How does a metal detector work? A longer iron bar and a shorter iron bar are exposed to the same magnetic field.Would the total magnetic flux produced in them be the same?