(a)A coil has an inductance of 0.4 H and a resistance of 20O. It is connected to a 240V, 50 Hz supply. Determine;
(i) The reactance of the coil.
(ii) The impedance of the circuit.
(iii) The maximum current through the coil.
(iv) The phase angle between the input voltage and current.
(c)A long solenoid of radius 3 cm and 5000 turns per unit length carries a varying current, i, given by
i=4 sin21t
where t is time in seconds.
Calculate the magnitude of the tangential electric field on a loop of radius 4cm after 10 seconds. Assume the coil and solenoid are concentric.
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