1. The instantaneous voltage v in a capacitive circuit is related to time t by the equation: v =
, where V , C and R are constants. Determine v, correct to 4 significant figures,
when t = 50ms, C = 10F, R = 47k and V = 300 volts.
1. Accelerations of a1 =1.5 m/s at 90. and a2 =2.6 m/s at 145. act at a point. Find a1 +a2 and a1 a2
by (i) drawing a scale vector diagram and (ii) by calculation.
2. Two alternating voltages are given by v1 =15 sin t volts and v2 =25 sin
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