A capacitor of capacitance `100 mu F` is connected to a battery of 20 volts for a long time and then disconnected from it. It is now connected across a long solenoid having 4000 turns per meter. It is found that the potential difference across the capacitor drops to `90^@` of its maximum value in 2.0 seconds. Estimate the average magnetic field produced at the centre of the solenoid during this period.

A capacitor of capacitance 50 muF is connected to a battery of 20 volts for a long time and then disconnected from it.It is now connected across a long solendoid having 8000 turns per minute.It is found that the potential difference across the capacitor drops to 90% of its maximum value is 2.0 seconds.The average magnetic field produced at the centre of the solenoid during this period is Npixx10^(-8) T .Then find value of N .

A capacitor of capacitance C is connected to a battery of EMF E for a long time and then disconnected. The charged capacitor is then connected across a long solenoid having n turns per meter in its closely packed winding on its core. After connections it is found that the voltage across the capacitor drops to E//eta in a time Delta t . In this period estimate the average magnetic induction at the centre of solenoid.

A capacitor is connected to a 36 V battery through a resistance of 20 Omega . It is found that the potential difference across the capacitor rises to 12.0 V in 2 mu s. Find the capacitance of the capacitor.

A capacitor of capacitance 100(mu)F is connected across a battery of emf6.0V through a resistance of 20k(Omega) for 4.0s after the battery is disconnecting?

A capacitor of capacitance 100(mu)F is connected across a battery of emf6.0V through a resistance of 20k(Omega) for 4.0s after the battery is disconnecting?

A capacitor of capacitance 100(mu)F is connected across a battery of emf6.0V through a resistance of 20k(Omega) for 4.0s after the battery is disconnecting?

A capacitor of capacitance 10 mu F is charged to a potential 50 V with a battery. The battery is now disconnected and an additional charge 200 mu C is given to the positive plate of the capacitor. The potential difference across the capacitor will be.

A capacitor of capacitance 10 mu F is charged to a potential 50 V with a battery. The battery is now disconnected and an additional charge 200 mu C is given to the positive plate of the capacitor. The potential difference across the capacitor will be.

A capacitor of capacitance 4 muF is fully charged to a potential difference of 12 V and then charging battery is disconnected. Charged capacitor is now connected across an inductor of self-inductance of 1.2 mH. The current in the circuit at a time when the potential difference across the capacitor is 6 V is