In an AC circuit, a condenser, a resistor and a pure inductor are connected in series across an alternator (AC generator). If the voltages across them are 20 V, 35 V and 20 V respectively, find the voltage supplied by the alternator.

Explanation

`V_(C )=20V, V_(R )=35V, V_(L)=20V`
`V = sqrt(V_(R )^(2)+(V_(L)^(2)-V_(C )^(2)))`
`V = sqrt((35)^(2)+(20^(2)-20^(2)))`
`V = sqrt(35^(2))`
`V = 35` Volt.