A closed circuit consists of a source of constant `emf E` and a choke coil of inductance `L` connected in series.The active resistance of the whole ci

Question

A closed circuit consists of a source of constant `emf E` and a choke coil of inductance `L` connected in series.The active resistance of the whole ci

A closed circuit consists of a source of constant `emf E` and a choke coil of inductance `L` connected in series.The active resistance of the whole circuit is equal to `R`.It is in steady state.At the moment `L=0` the choke coil inductance was decreased abruptly `4` times.The current in the circuit as a function of time `t` is `E/R[1-xc^(-4tR//L)]`.Find out value of `x`.

Monjur Alahi

6 views

2025-01-04 04:42

1 Answers

Related Questions

A coil of inductance `L=50muH` and resistance = `0.5Omega` is connected to a battery of emf = 5V. A resistance of `10Omega` is connected parallel to t

2 Answers 5 Views

A capacitor of capacitance 250 pF is connected in parallel with a choke coil having inductance of `1.6 xx 10^(-2) H` and resistance `20 Omega`. Calcul

2 Answers 9 Views

An AC circuit consists of a resistance and a choke coil in series . The resistance is of 220 `Omega` and choke coils is of 0.7 H . The power abosorbed

2 Answers 6 Views

Assertion: If an inductor coil is connected to DC source, the current supplied by it is `I_(1)`. If the same coil is connected with an AC source of sa

2 Answers 5 Views

When an inductor coil is connected to an ideal battery of emf `10V`, a constant current `2.5 A` flows. When the same inductor coil is connected to an

2 Answers 5 Views

A series circuit consists of a resistance inductance and capacitance.The applied voltage and the current at any instant are given by `E=141.4 cos(5000

2 Answers 9 Views

An ammeter of resistance 0.02 `Omega` is connected in the usual may to a circuit in a circuit consisting of a cell of emf 2V and internal resistance `

2 Answers 7 Views

A inductor of 20mH inductance and a resistor of `100 Omega` resistance are connected in series to a battery of emf 10V. After a long time the circuit

2 Answers 5 Views

A pure inductance is connected in parallel to a resistor R and then connected to a cell of emf `epsilon` and of resistance R through at key . Find the

2 Answers 4 Views

A series circuit consists of a resistance, inductance and capacitance. The apllied voltage and the current at any instant are given as e=141.4 cos (30

2 Answers 5 Views

Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Correct Answer - C
We write the equation of the circuit as `Ri+L/eta(di)/(dt)=xi`
For `t le 0`.The current at `t=0` just after inductance is changed is `i=etaxi/R`, so that the flux through the inductance is unchanged We look for a solution of the above equation in the form `i=A+Be^(-t//C)`
substituting `C=L/(etaR),B=eta-1,A=xi/R`.
Thus,`i=xi/R(1+(eta-1)e^(-eta Rt//L))`.
Put values `x=3`