What resistance must be connected in series with an inductor of 5mH so that the circuit has a time constant of `2 xx 10^(-3)S` ?

A condenser of capacity 1 mu F and a resistance 0.5 mega-ohm are connected in series with a DC supply of 2 V. The time constant of circuit is

The time constant of a circuit is 10 sec , when a resistance of 10 Omega is connected in series in a prevouse circuit then time constant becomes 2 second, then the self inductance of the circuit is :-

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 is short-circuited and the battery is disconnected. Find the current in the circuit 1 ms after short-circuiting.

A capacitor of 10 microfarad is connected in series with a resistance of 2.2 xx 10^5 ohm. Determine the time constant for the circuit. Can we think of oscillations in this circuit, such that the frequency is equal to the inverse of the time constant? Justify your answer with proper explanation.

A carbon filament has resistance of 120 Omega at 0^(@)C what must be the resistance of a copper filament connected in series with carbon so that combi-nation has same resistance at all temperatures (alpha_(carbon)=-5 xx 10^(-4)//^(0)C, alpha_(copper)=4 xx 10^(-3)//^(0)C)