A salient pole generator has direct axis synchronous reactance Xd= 0.9p. u. and quadrature axis synchronous reactance Xq= 0.7p. u. When the generator is open circuited, a field current of 50 A produces a terminal voltage of 1.0 per unit. If field current is 60 A, and the generator is supplying 1.0 per unit real power to an infinite bus with |V| = 1.0V p. u., find the power factorat which the generator is operating.

Answer and Explanation:

The solution to the question is attached below

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation: