ABSTRACT
Find also the current flowing in each of the other two branches of the circuit. (27)
2. A d.c. voltage source has an internal resistance of 2 and an open circuit voltage of 24V. State the value of load resistance that gives maximum power dissipation and determine the value of this power. (5)
3. A sinusoidal voltage has a mean value of 3.0A. Determine it’s maximum and r.m.s. values. (4)
4. The instantaneous value of current in an a.c. circuit at any time t seconds is given by: i = 50 sin(100πt − 0.45) mA. Determine (a) the peak to peak current, the frequency, the
periodic time and the phase angle (in degrees) (b) the current when t = 0 (c) the current when t = 8 ms (d) the first time when the voltage is a maximum. Sketch the current for one cycle showing relevant points. (14)
