1
GATE ECE 1990
MCQ (Single Correct Answer)
+2
-0.6
Two isotropic antennas are separated by a distance of two wavelengths. If both the antennas are fed with currents of equal phase and magnitude, the number of lobes in the radiation pattern in the horizontal plane are
A
2
B
4
C
6
D
8
2
GATE ECE 1990
MCQ (Single Correct Answer)
+1
-0.3
In a junction diode
A
The depletion capacitance increases with increase in the reverse bias
B
The depletion capacitance decreases with increase in the reverse bias
C
The depletion capacitance increases with increase in the forward bias
D
The depletion capacitance is much higher than the depletion capacitance when it is forward bias.
3
GATE ECE 1990
MCQ (Single Correct Answer)
+2
-0.6

If the Laplace transform of the voltage across a capacitor of value of $$\frac12\;\mathrm F$$ is $$V_C\;\left(s\right)\;=\;\frac{s\;+\;1}{s^3\;+\;s^2\;+\;s\;+\;1}$$ , the value of the current through the capacitor at t = 0+ is

A
0 A
B
2 A
C
$$\frac12\;\mathrm A$$
D
1 A
4
GATE ECE 1990
Subjective
+10
-0
The switch $$S$$ in figure is thrown to position $$'a'$$ at $$t = 0$$. At $$t = 1$$ second, the switch is thrown to position $$'b'$$. Find the current through $${R_2}$$ for $$ t > 1$$ sec. GATE ECE 1990 Network Theory - Transient Response Question 2 English
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