For L - R circuit, time constant is equal to

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7.Alternating Current

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For $L - R$ circuit, the time constant is equal to

twice the ratio of the energy stored in the magnetic field to the rate of the dissipation of energy in the resistance.

the ratio of the energy stored in the magnetic field to the rate of dissipation of energy in the resistance.

half of the ratio of the energy stored in the magnetic field to the rate of dissipation of energy in the resistance.

square of the ratio of the energy stored in the magnetic field to the rate of dissipation energy in the resistance.

Solution

The time required for the current flowing in the $LR$ series circuit to reach its maximum steady state value is equivalent to about $5$ time constants or $5 t.$ This time constant $\tau,$ is measured by $\tau=L / R,$ in seconds, where $R$ is the value of the resistor in ohms and Lis the value of the inductor in Henries

Standard 12

Physics

An inductive circuit contains resistance of $10\,\Omega $ and an inductance of $20\,H$ . If an $ac$ voltage of $120\,V$ and frequency $60\,Hz$ is applied to his circuit, the current would be nearly …………….$Amp$

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What is phase difference between $V $ and $I$ in a circuit containing only a resistor ?

easy

The value of the current through an inductance of $1H$ and of negligible resistance, when connected through an $ac$ source of $200 \,V$ and $50 \,Hz$ is

easy

A coil of inductance $0.50\;H$ and resistance $100 \;\Omega$ is connected to a high frequency supply $(240\; V, 10 \;k\,Hz)$

$(a)$ What is the maximum current in the coil?

$(b)$ What is the time lag between the voltage maximum and the current maximum?

Hence, explain the statement that at very high frequency, an inductor in a circuit nearly amounts to an open circuit. How does an inductor behave in a $dc$ circuit after the steady state?

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An inductive circuit contains resistance of $10$ $\Omega$ and an inductance of $20\, H$. If an $ac$ voltage of $120 \,V$ and frequency $60\, Hz$ is applied to this circuit, the current would be nearly

medium

For $L - R$ circuit, the time constant is equal to

Solution

Similar Questions

An inductive circuit contains resistance of $10\,\Omega $ and an inductance of $20\,H$ . If an $ac$ voltage of $120\,V$ and frequency $60\,Hz$ is applied to his circuit, the current would be nearly …………….$Amp$

What is phase difference between $V $ and $I$ in a circuit containing only a resistor ?

The value of the current through an inductance of $1H$ and of negligible resistance, when connected through an $ac$ source of $200 \,V$ and $50 \,Hz$ is

An inductive circuit contains resistance of $10$ $\Omega$ and an inductance of $20\, H$. If an $ac$ voltage of $120 \,V$ and frequency $60\, Hz$ is applied to this circuit, the current would be nearly

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