Q. Two moving coil galvanometers and are connected in series and a current passes through them. Their readings are found to be full scale for and half scale for . Given that their scales are identical and their restoring springs of same strength, but that 's coil is twice as large in area and has twice the number of turns compared with 's coils. Calculate the ratio of magnetic field strength of 's magnet to that of 's magnet.

 288  160 Moving Charges and Magnetism Report Error

Answer: 0.50

Solution:

Current sensitivity,
Same, Same
so,