GATE 2010 Electronics and Communication Engg (EC) Paper

Q. No. 1 – 25 Carry One Mark Each
1. The eigen values of a skew-symmetric matrix are
(A) always zero (B) always pure imaginary
(C) either zero or pure imaginary (D) always real
5. For parallel RLC circuit, which one of the following statements is NOT correct?
(A) The bandwidth of the circuit deceases if R is increased
(B) The bandwidth of the circuit remains same if L is increased
(C) At resonance, input impedance is a real quantity
(D) At resonance, the magnitude of input impedance attains its minimum value.
6. At room temperature, a possible value for the mobility of electrons in the inversion
layer of a silicon n-channel MOSFET is
(A) 450 cm2/V-s (B) 1350 cm2/V-s (C) 1800 cm2/V-s (D) 3600 cm2/V-s
7. Thin gate oxide in a CMOS process in preferably grown using
(A) wet oxidation (B) dry oxidation
(C) epitaxial deposition (D) ion implantation

Q. No. 26 – 51 Carry Two Marks Each
Q. No. 61 – 65 Carry Two Marks Each
61. Modern warfare has changed from large scale clashes of armies to suppression of
civilian populations. Chemical agents that do their work silently appear to be suited
to such warfare; and regretfully, there exist people in military establishments who
think that chemical agents are useful tools for their cause.
which of the following statements best sums up the meaning of the above
passage:
(A) Modern warfare has resulted in civil strife.
(B) Chemical agents are useful in modern warfare.
(C) Use of chemical agents in warfare would be undesirable.
(D) People in military establishments like to use chemical agents in war.
62. If 137+276=435 how much is 731+672?
(A) 534 (B) 1403 (C) 1623 (D) 1513
63. 5 skilled workers can build a wall in 20 days; 8 semi-skilled worker can build a wall
in 25days; 10 unskilled workers can build a wall in 30 days. If a team has 2 killed,
6 semi-skilled and 5 unskilled workers, how long will it take to build the wall?
(A) 20 days (B) 18 days (C) 16 days (D) 15 days
64. Given digits 2,2,3,3,3,4,4,4,4 how many distinct 4 digit numbers greater than
3000 can be formed?
(A) 50 (B) 51 (C) 52 (D) 54
65. Hari (H), Gita (G), Irfan (I) and Saira (S) are sibiligs (i.e. brothers and sisters). Allwere born on 1st January. The age difference between any two successive siblings(that is born one after another) is less than3 years. Given the following facts:
i. Hair’s age + Gita’s age > Irfan’s age + Saira’s age.
ii. The age difference between Gita and Saira is 1 year. However, Gita is not the
oldest and Saira is not the youngest.
iii. There are not twins.
In what order were they born (0ldest first)?
(A) HSIG (B) SGHI (C) IGSH (D) IHSG


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