1.

In a series L-C-R circuit, resistance R = 10 Omega and the impedance Z =20 Omega. The phase = difference between the current and the voltage is .....

Answer»

`30^@`
`45^@`
`60^@`
`90^@`

SOLUTION :cos `delta=R/Z`
`=10/20`
`=1/2`
`THEREFORE delta=cos^(-1) (1/2)`
`therefore delta=60^@`


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