1.

Two concentric coils each of radius equal to 2πcm are placed right angles to each other. If 3 A and 4 A are the currents flowing through the two coils respectively. The magnetic induction( in Wb m^(-2) )at the center of the coils will be

Answer»

`7 xx 10^(-5)`
`5 xx 10^(-5)`
`10^(-5)`
`12 xx 10^(-5)`

SOLUTION :`B= (mu_(0)I)/(2R)`
`B_(1)= (mu_(0))/(2) (3)/(2pi xx 10^(-2))= 3 xx 10^(-5)T`
`B_(2)= (mu_(0))/(2) (4)/(2pi xx 10^(-2))= 4 xx 10^(-5)T`
`B= sqrt(B_(1)^(2))+ B_(2)^(2)= 5 xx 10^(-5)T`


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