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A series L-C-R circuit is connected acro...

A series L-C-R circuit is connected across a variable frequency source of emf. `V_(L), V_(C), V_(R)` are instantaneous voltage drops across inductor capacitor and resistor and V is instantaneous voltage across the circuit.
`{:(" Column I",," Column II"),((A) |V|,,(p) "Can be greater than zero"),((B) |V|-|V_(L)|,,(q) "Can be less than zero"),((C) |V|-|V_(C)|,,(r)"Can be equal to zero"),((D) |V|-|V_(R)|,,):}`

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The correct Answer is:
A(p,r), B(p,q,r), C(p, q, r), D(p, r)
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Knowledge Check

  • In a series LCR circuit, the the rms voltage supply is 170 V. If V_(R), V_(L) and V_(C) represent the rms voltage drop across resistor , inductor and capacitor, then

    A
    `V_(R) le 170V` (always)
    B
    `V_(L) ge 170 V` (always)
    C
    `V_(L) or V_(C)` may be greater than 170 V
    D
    `|V_(L)-V_(C)| lt 170`

  • In an LCR circuit, the voltages across the components are V_(L) , V_(C) and V_(R) respectively. The voltage of source will be -

    A
    `[V_(R)+V_(L)+V_(C)]`
    B
    `[(V_(R)^(2)+V_(L)^(2)+V_(C)^(2)]^(1//2)`
    C
    `[(V_(R)^(2)+(V_(L)+V_(C))^(2)]^(1//2)`
    D
    `[(V_(R)^(2)+(V_(L)-V_(C))^(2)]^(1//2)`

  • In a series L.C.R. circuit, the potential drop across L , C and R respectively are 40V , 120V and 60V . Them the source voltage is

    A
    `220V`
    B
    `160V`
    C
    `180V`
    D
    `100V`

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