1
GATE ECE 1999
Subjective
+5
-0
A 100 m section of an air-filled rectangular wave-guide operating in the $$T{E_{10}}$$ mode has a cross-sectional dimension of 1.071 cm $$ \times $$ 0.5 cm. Two pulses carriers of 21 GHz and 28 GHz are simultaneously launched at one end of the wave-guide section. What is the time delay difference between the two pulses at the other end of the waveguide?
2
GATE ECE 1999
MCQ (Single Correct Answer)
+2
-0.6
An n-channel JEFT has IDSS = 2 mA and Vp = −4 V. It's transconductance gm (in mA/V) for an applied gate-to-source voltage VGS of –2V is:
A
0.25
B
0.5
C
0.75
D
1.0
3
GATE ECE 1999
MCQ (Single Correct Answer)
+1
-0.3
If $$\,\,L\left\{ {f\left( t \right)} \right\} = F\left( s \right)$$ then $$\,\,\,L\left\{ {f\left( {t - T} \right)} \right\}$$ is equal to
A
$${e^{s\,T}}F\left( s \right)$$
B
$${e^{ - s\,T}}F\left( s \right)$$
C
$${{F\left( s \right)} \over {1 - {e^{s\,T}}}}$$
D
$${{F\left( s \right)} \over {1 - {e^{ - s\,T}}}}$$
4
GATE ECE 1999
MCQ (Single Correct Answer)
+1
-0.3
If $$CS\;=\overline{A_{15}}\;A_{14}\;A_{13}$$ is used as the chip select logic of a 4K RAM in an 8085 system, then its memory range will be
A
3000H – 3FFFH
B
7000H – 7FFFH
C
5000H – 5FFFH and 6000H – 6FFFH
D
6000H – 6FFFH and 7000H – 7FFFH
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