ElectroMagnetic InductionHard
Question
A student connects a long air cored-coil of magnanin wire to a 100 V D.C. supply and records a current of 25 amp. When the same coil is connected across 100 V. 50 Hz A.C. the current reduces to 20 A, the reactant of the coil. is : -
Options
A.4 Ω
B.3 Ω
C.5 Ω
D.None
= 4Ω
= 5π ⇒ ωL = 3ΩMore ElectroMagnetic Induction Questions
In an LC circuit, the capacitor has maximum charge q0. The value of is...An LR circuit with a battery is connected at t = 0. Which of the following quantities is not zero just after the connect...In a D.C. motor the back emf will be maximum at the :-...A 50 turn circular coil has a radius of 3 cm, it is kept in a magnetic field acting normal to the area of the coil. The ...An ac source of angular frequency ω is fed across a resistor R and a capacitor C in series. The current registered ...