1.

A coil of inductance L and resistance R is connected to an A.C. source of V volt. If the angular frequency of the A.C. source is equal to omega"rads"^(-1), then the current in the circuit will be………

Answer»

`V/R`
`V/L`
`V/(R+L)`
`V/sqrt(R^2+omega^2L^2)`

SOLUTION :`I=V/"|Z|"` but `|Z|=sqrt(R^2+omega^2L^2)`
`THEREFORE I=V/sqrt(R^2+omega^2L^2)`


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