A 20,volts ac is applied to a circuit consisting of a resistance and a coil with negligible resistan

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7.Alternating Current

medium

$A$ $20\,volts$ $ac$ is applied to a circuit consisting of a resistance and a coil with negligible resistance. If the voltage across the resistance is $12\, V$, the voltage across the coil is.....$volts$

$16 $

$10$

$8$

$6$

Solution

(a) The voltage across a $L-R$ combination is given by
${V^2} = V_R^2 + V_L^2$
${V_L} = \sqrt {{V^2} – V_R^2} = \sqrt {400 – 144} = \sqrt {256} = 16\,\,volt.$

Standard 12

Physics

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medium

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(AIIMS-2010)

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(AIEEE-2006)

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easy

$A$ $20\,volts$ $ac$ is applied to a circuit consisting of a resistance and a coil with negligible resistance. If the voltage across the resistance is $12\, V$, the voltage across the coil is.....$volts$

Solution

Similar Questions

$A$ capacitor of capacitance $2 \mu F$ is charged to a potential difference of $12\, V$. It is then connected across an inductor of inductance $0.6\, mH$. The current in the circuit when the potential difference across the capacitor is $6 \,V$ is :……$A$

The reading of ammeter in the circuit shown will be…..$A$

In an $ac$ circuit, the potential difference across an inductance and resistance joined in series are respectively $16\, V$ and $20 \,V$. The total potential difference across the circuit is…….$V$

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