Two similar coupled coils are connected in series. The total inductance in series aiding connection is 100 mH. If currents is 3 A, the energy stored in magnetic field is

In a two terminals network the O.C. voltage measured at the given terminals is 100 V and s.c., currents at the same terminals 5 A. If a load of 80 Ω resistance is connected at the terminals, load current is

Two similar coils have self inductance of 1 mH each. Coefficient of coupling is 0.5. The mutual inductance M is

Which statement is true for an ac circuit?

Three resistance of 15 Ω each are connected in delta. The resistance of equivalent star will have a value of

In a parallel resonant circuit, the circuit current at resonance is maximum.

A two branch tuned circuit has a coil of resistance R and inductance L in one branch and capacitance C in the second branch. If R is increased, the dynamic resistance

A capacitor used for power factor correction is single phase circuit decreases

Two coils having self inductances of 10 mH and 40 mH are mutually coupled. The maximum possible mutual inductance is

A series RLC circuit has a resonant frequency of 1000 Hz. The maximum voltage across C is likely to occur at a frequency of about

A current is flowing through a conductor with non-uniform area of cross-section. Then