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A 12 ohm resistor and a 0.21 henry induc...

A `12 ohm` resistor and a `0.21` henry inductor are connected in series to an `AC` source operating at 20volts,` 50` cycle/second. The phase angle between the current and the source voltage is

A

`30^(@)`

B

`40^(@)`

C

`80^(@)`

D

`90^(@)`

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