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In a purely resistive ac circuit, the cu...

In a purely resistive ac circuit, the current

A

Lags behind the e.m.f. in phase

B

Is in phase with the e.m.f.

C

Leads the e.m.f. in phase

D

Leads the e.m.f. in half the cycle and lags behind it in the other half

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • In a purely resistive AS circuit,

    A
    voltage leads current
    B
    voltge lags current
    C
    voltage and current are in same phase
    D
    nothing can be said

  • In a purely inductive circuit, the current is

    A
    in phase with the voltage
    B
    out of phase with the voltage
    C
    leads the voltage by ` pi//2 `
    D
    lags behind the voltage by ` pi// 2 `

  • In a purely capacitive circuit, the current

    A
    lead the applied emf by `pi//2`
    B
    lags behind of applied emf by `pi//2`
    C
    in same phase of applied emf
    D
    none of these

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    Assertion : In a purely inductive or capacitive circuit, the current is referred to as wattless currents. Reason : No power is dissipated in a purely inductive or capacitive circuit even though a current is flowing in the circuit.

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