1
GATE EE 1999
+1
-0.3
The current in the circuit shown in figure is A
$$5$$ $$A$$
B
$$10$$ $$A$$
C
$$15$$ $$A$$
D
$$25$$ $$A$$
2
GATE EE 1998
+1
-0.3
A sinusoidal source of voltage $$V$$ and frequency $$f$$ is connected to a series circuit of variables resistance, $$R$$ and a fixed reactance, $$X.$$ The locus of the tip of the current phasor, $$I$$, as $$R$$ is varied from $$0$$ to $$\infty$$ is
A
a semicircle with a diameter of $$V/X.$$
B
a straight line with a slope of $$R/X.$$
C
an ellipse with $$V/R$$ as major axis.
D
a circle of radius $$R/X$$ and origin at $$\left( {0,\,\,\,V/2} \right).$$
3
GATE EE 1998
+1
-0.3
A circuit with a resistor, inductor and capacitor in series is resonant at $${f_0}\,\,Hz.$$ If all the component values are now doubled, the new resonant frequency is
A
$$2\,\,{f_0}$$
B
still $${f_0}$$
C
$${f_0}/4$$
D
$${f_0}/2$$
4
GATE EE 1996
+1
-0.3
In the circuit shown in Fig. $$X$$ $$-$$ is an element which always absorbs power. During a particular operation, it sets up a current of $$1$$ $$amp$$ in the direction shown and absorbs a power $${P_{x}}.$$ It is possible that $$X$$ can absorb the same power $${P_x}$$ for another current $$i.$$ Then the value of this current is A
$$\left( {3 - \sqrt {14} } \right)\,\,amps$$
B
$$\left( {3 + \sqrt {14} } \right)\,\,amps$$
C
$$5$$ $$amps$$
D
None of these
GATE EE Subjects
Electromagnetic Fields
Signals and Systems
Engineering Mathematics
General Aptitude
Power Electronics
Power System Analysis
Analog Electronics
Control Systems
Digital Electronics
Electrical Machines
Electric Circuits
Electrical and Electronics Measurement
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