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A coil of inductance 40 henry is connected in series with a resistance of 8 ohm and the combination is joined to the terminals of a 2 volt battery. The time constant of the circuit is
A solenoid has an inductance of 60 henrys and a resistance of 30 ohms. If it is connected to a 100 volt battery, how long will it take for the current to reach $\frac{{e - 1}}{e} \approx 63.2\% $ of its final value
An inductor, L a resistance R and two identical bulbs, ${B_1}$ and ${B_2}$ are connected to a battery through a switch S as shown in the figure. The resistance R is the same as that of the coil that makes L. Which of the following statements gives the correct description of the happenings when the switch S is closed Question Image
The time constant of an LR circuit represents the time in which the current in the circuit
A LC circuit is in the state of resonance. If $C = 0.1\mu F$ and $L = 0.25$ henry. Neglecting ohmic resistance of circuit what is the frequency of oscillations
An oscillator circuit consists of an inductance of $0.5mH$ and a capacitor of $20 \mu F$. The resonant frequency of the circuit is nearly
A coil of inductance 300 mH and resistance $2\Omega $ is connected to a source of voltage $2V$. The current reaches half of its steady state value in
A coil having an inductance of 0.5 H carries a current which is uniformly varying from zero to 10 ampere in 2 second. The e.m.f. (in volts) generated in the coil is
The square root of the product of inductance and capacitance has the dimension of
Which of the following does not depend upon the magnetic effect of some sort

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