A permanent magnet? Mark as favorite Copy Link attracts some substances and repels others attracts all paramagnetic substances and repels others attracts only ferromagnetic substances attracts ferromagnetic substances and repels all others Check Answer
The magneto-motive force is? Mark as favorite Copy Link the voltage across the two ends of exciting coil the flow of an electric current the sum of all currents embraced by one line of magnetic field the passage of magnetic field through an exciting coil Check Answer
Materials subjected to rapid reversal of magnetism should have? Mark as favorite Copy Link large area of B-H loop high permeability and low hysteresis loss high coercivity and high retentivity high coercivity and low density Check Answer
Which of the following materials are diamagnetic? Mark as favorite Copy Link Silver Copper Silver and copper Iron Check Answer
The change of cross-sectional area of conductor in magnetic field will affect? Mark as favorite Copy Link reluctance of conductor resistance of conductor (a) and (b) both in the same way none of the above Check Answer
The working of a meter is based on the use of a permanent magnet. In order to protect the meter functioning from stray magnetic fields? Mark as favorite Copy Link meter is surrounded by strong magnetic fields a soft iron shielding is used a plastic shielding is provided a shielding of a non-magnetic material is used Check Answer
The relative permeability is less than unity is case of? Mark as favorite Copy Link ferromagnetic materials ferrites non-ferrous materials diamagnetic materials Check Answer
A permeable substance is one? Mark as favorite Copy Link which is a good conductor which is a bad conductor which is a strong magnet through which the magnetic lines of force can pass very easily Check Answer
Main causes of noisy solenoid are? Mark as favorite Copy Link strong tendency of fan out of laminations at the end caused by repulsion among magnetic lines of force uneven bearing surface, caused by dirt or uneven wear between moving and stationary parts both of above none of the above Check Answer
What will be the current passing through the ring shaped air cored coil when number of turns is 800 and ampere turns are 3200? Mark as favorite Copy Link 2 4 6 8 Check Answer