1.

An alternating voltage given by V =140 sin 314 t isconnected across a pure resistor of 50 Omega find : (i)the frequency of the source. (ii) The rms current through the resistor.

Answer»

Solution :(i) `2pi v = omega`
`rArr 2pi v = 314 rad s^(-1)`
`rArr v = 50 Hz`
(II) `I_(rms) = (V_(rms))/(R )` Where `V_(rms) = (V_(0))/(sqrt(2))`
`I_(rms) = (140)/(sqrt(2) xx 50) = 1.98 ~~ 2A`


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