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⭕ Help me in this, thanks..!  Answer given is 45° Asked by jhajuhi19 | 18 May, 2021, 08:55: AM Expert Answer
Alternating current in LCR circuit is given as ,

i = im sin( ω t + φ ) ...............................(1)

where φ is phase difference between voltage and current.

At half power , i.e., when circuit is giving half of maximum power , current in the alternating cicuit i = im / √2

Hence eqn.(1) is written at half power as ,   ( im / √2 ) = im sin( ω t + φ )

Hence we get , sin( ω t + φ ) = 1 / √2

at t = 0 , we get from above equation , sin ( φ ) = 1 / √2  or   φ = ( π/4 ) rad = 45o

Hence phase difference between Current and voltage is 45o
Answered by Thiyagarajan K | 18 May, 2021, 03:50: PM
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