A 6 0 − Hz , single-phase source with V = 277 ∠ 30 ° volts is applied to a circuit element. (a) Determine the instantaneous source voltage. Also determine the phasor and instantaneous currents entering the positive terminal if the circuit element is (b) a 20 − Ω resistor. (C) a 10 − mH inductor, and (d) a capacitor with 25 − Ω reactance.
A 6 0 − Hz , single-phase source with V = 277 ∠ 30 ° volts is applied to a circuit element. (a) Determine the instantaneous source voltage. Also determine the phasor and instantaneous currents entering the positive terminal if the circuit element is (b) a 20 − Ω resistor. (C) a 10 − mH inductor, and (d) a capacitor with 25 − Ω reactance.
Solution Summary: The author explains the instantaneous source voltage and its value.
A
6
0
−
Hz
, single-phase source with
V
=
277
∠
30
°
volts is applied to a circuit element. (a) Determine the instantaneous source voltage. Also determine the phasor and instantaneous currents entering the positive terminal if the circuit element is (b) a
20
−
Ω
resistor. (C) a
10
−
mH
inductor, and (d) a capacitor with
25
−
Ω
reactance.
8. A 4-µF capacitor, a 6-uF capacitor, and an 8-μF
capacitor are in parallel across a 300-V source.
Find (a) the total capacitance, (b) the magnitude
of charge stored by each capacitor, and (c) the
total stored energy.
When the electromotive force is removed from a circuit Containing
inductance and resistance but no capacitors, the rate of decrease of the
current is proportional to the current. If the initial current is 30 amp and
it's down to 1 amp after 0.01 sec, what is the current after 0.03 sec?
A 30-volt electromotive force is applied to an LR series circuit in which the inductance is 0.1 henry and the resistance is 50 ohoms. Determine the current i(t) if i(0) = 0.
Chapter 2 Solutions
MindTap Engineering, 1 term (6 months) Printed Access Card for Glover/Overbye/Sarma's Power System Analysis and Design, 6th
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