1
GATE EE 2002
+2
-0.6
In the circuit shown in Fig. what value of $$C$$ will cause a unity power factor at the $$ac$$ source? A
$$68.1\,\,\mu F$$
B
$$165\,\,\mu F$$
C
$$0.681\,\,\mu F$$
D
$$6.81\,\,\mu F$$
2
GATE EE 2002
+2
-0.6
A series $$R-L-C$$ circuit has $$R = 50\Omega ;$$ $$L=100$$ $$\mu H$$ and $$C = 1\,\,\mu F.$$ The lower half power frequency of the circuit is
A
$$30.55$$ $$kHz$$
B
$$3.055$$ $$kHz$$
C
$$51.92$$ $$kHz$$
D
$$1.92$$ $$kHz$$
3
GATE EE 2002
+2
-0.6
In the circuit shown in Fig. it is found that the input $$ac$$ voltage $$\left( {{V_i}} \right)$$ and current $$i$$ are in phase. The coupling coefficient is $$K = {M \over {\sqrt {{L_1}{L_2}} }},$$ where $$M$$ is the mutual inductance between the two coils. The value of $$K$$ and the dot polarity of the coil $$P-Q$$ are A
$$K = 0.25$$ and dot at $$P$$
B
$$K = 0.5$$ and dot at $$P$$
C
$$K = 0.25$$ and dot at $$Q$$
D
$$K = 0.5$$ and dot at $$Q$$
4
GATE EE 2002
+2
-0.6
A first order, low pass filter is given with $$R = 50\,\,\Omega$$ and $$C$$ $$= 5\mu F.$$ What is the frequency at which the gain of the voltage transfer function of the filter is $$0.25?$$
A
$$4.92$$ $$kHz$$
B
$$0.49$$ $$kHz$$
C
$$2.46$$ $$kHz$$
D
$$24.6$$ $$kHz$$
GATE EE Subjects
Electric Circuits
Electromagnetic Fields
Signals and Systems
Electrical Machines
Engineering Mathematics
General Aptitude
Power System Analysis
Electrical and Electronics Measurement
Analog Electronics
Control Systems
Power Electronics
Digital Electronics
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