Alternating CurrentEasy
Question
A student connects a long air cored - coil of manganin 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 reactance of the coil is :-
Options
A.4 Ω
B.3 Ω
C.5 Ω
D.None of these
More Alternating Current Questions
Which is not correct for capacitive reactance -...Power factor of a best choke coil is :...An inductor and a resistor in series are connected to an A.C. supply of variable frequency. As the frequency of the sour...The voltage of an AC source varies with time according to the equation, V = 100 sin 100 π t cos 100 πt. Where ...The average power delivered to a series AC circuit is given by (symbols have their usual meaning) :...