Question

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(8] 3. An AC generator is connected to a circuit. The generator's emf is sw - 172V sin(at). If the maximum current that results is 150 mA circuit, -5.01 x 10 rad/s and the phase angle is -85.6 degrees, complete the following sin (au- [8] 4. The amplitude of an alternating current is lox - 19.2 x 10 Amperes. What is value of ..? Answer: (a) 18.0 A. (b) 25.0 A. (c) 32.1 A. (d) 47.5 A (@) 60.5 A. (0) - 14) 5. In a series RLC circuit, the resistance is R-34.5 m . At a certain frequency the circuit is in resonance and the value of the inductive reactance at that time is X is 42.5 mo. At that time the capacitive reactance Xe must be Answer (*) 0, (b) 17.3 m, (c) 34.5 m2, (d) 42.5 m2. (e) 56.5 m (1)

Answer 1

Elt) = 172V (sinut) Maximum current, Io = 150 mA W =5.01x107 rad/s. & = - 85.6° iLt) = Io sin (wt-4) - (150 mA)sin (but - 85.6°) (4 Imax = 19.2 x 10-3 A. Soms het 192x103A V2 In = 13.58x10-3 A R = 34.5 m2 At resonance, XL=42.5 mr. We knows at resonance, XL=xe. answer is :- @ 42.5 me