in ,

The magnetic permeability of free space is

Q. The magnetic permeability of free space is

 A   10^-7 h/m
 B   4π x 10^7 h/m
 C   (10^-7 / 4π) h/m
 D   4 /10^-7 h/m
Answer:-(10^-7 / 4π) h/m

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The instrument which is used to measure the current flowing through a circuit is

Beta particles are