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Complex Power Apparent Power and Power Triangle
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Q=Im[S] is
complex power
reactive power
apparent power
Real power
Low resistive material is
aluminum
Mica
Glass
Paper
Ohm's law states that resistor 'R' is directly proportional to
Current
Voltage
Capacitance
Inductance
When three equal impedances are connected in delta, phase currents w.r.t line currents make
180° angles
30° angles
90° angles
20° angles
P=Re[S] is
reactive power
Real power
apparent power
complex power
If source voltage v=V√2cosωt to a parallel RLC combination, than total instantaneous power of circuit is equals to
V/Rcosωt
V/R
V/R²
V²/R
In a two terminal network, terminal voltage is related to terminal current by the
Capacitance
Source
impedance
Frequency
In a two terminal network, terminal voltage is related to terminal current by the
Capacitance
Frequency
impedance
Source
Which of following is polar form of phasor
θ
V<θ
V(cosθ+jsinθ)
Vejθ
Property of an element describing a linear relationship between cause and effect is called
Singularity
linearity
Additivity
Homogeneity
Property of an element describing a linear relationship between cause and effect is called
Homogeneity
Singularity
linearity
Additivity
Polar form 0.05
(4.32-j2.50)x10−2S
(2.32-j3.50)x10−2S
(4.32+j2.50)x10−2S
(4.32-j3.50)x10−2S
Polar form 0.05
(2.32-j3.50)x10−2S
(4.32-j2.50)x10−2S
(4.32-j3.50)x10−2S
(4.32+j2.50)x10−2S
A certain passive network has equivalent impedance Z=3+j4Ω and an applied voltage of v=42.5cos
(1000t+30°), than power factor of network is equals to
sin13.2°
sin53.13°
cos13.2°
cos53.13°
A certain passive network has equivalent impedance Z=3+j4Ω and an applied voltage of v=42.5cos
(1000t+30°), than power factor of network is equals to
cos13.2°
sin13.2°
sin53.13°
cos53.13°
In Maximum Power Transfer theorem, maximum resistance 'Rmax' can be find out by
Rmax=Vx4R
Rmax=V/4R
Rmax=4R/V
Rmax=V2/4R
Power factor of certain passive network with equivalent impedance Z=3+j4Ω and an applied voltage of v=42.5cos
(1000t+30°), is
0.6 lagging
0.6 leading
equals to zero
Infinite
Energy stored in a single inductor L carrying current i is
Li2 J
0.5Li2 J
Li J
L/i2 J
A key circuit element used in power systems used for stepping up or stepping down ac voltages or currents is known as
Inductor
Transformer
capacitor
Transistor
A key circuit element used in power systems used for stepping up or stepping down ac voltages or currents is known as
Inductor
Transformer
Transistor
capacitor
1
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