AKTU/UPTU:- Quantum Series For B.tech

Quantum Series For B.tech AKTU
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Gate Questions paper 2022 with answer

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1:-  In the circuit shown below, the initial charge on the capacitor is 2.5 mC, with the voltage polarity as indicated . The switch is closed at time t = 0 the current it at a time t after the switch is closed is  (A) i(t)=15 exp(-2×10³t)A. (B) i(t)= 5 exp(-2×10³)A. (C) i(t) =10 exp(-2×10³)A. (D) i(t) = -5 exp(-2×10³)A. ANSWER :-   i(t)=15 exp(-2×10³t)A 2:- The Z- parameter matrix [z¹¹z¹² z²¹z²²] for the two port network shown is (A):- 0 (B):-  99 (C):- 63 (D):-  12 ANSWER:-               0 3:- If Ä’ = -(2y³-3yz²)x^ -(6xy²-3xz²)6y^+(6xyz)z^ is the electric field in a source free region a valid expression for the electrostatic potential is (A):- xy³-yz² (B):- 2xy³-xyz² (C):- y³+xyz² (D):-  2xy³-3xyz² ANSWER:-         2xy³-3xyz² 4:-  Two Silicon diodes,with a forward voltage drop of 0.7 v are used in the circuit shown in the figure. The range of input voltage...
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Antenna Theory - Half-Wave Folded Dipole

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A folded dipole is an antenna, with two conductors connected on both sides, and folded to form a cylindrical closed shape, to which feed is given at the center. The length of the dipole is half of the wavelength. Hence, it is called as  half wave folded dipole antenna . Frequency range The range of frequency in which half wave folded dipole operates is around 3KHz to 300GHz. This is mostly used in television receivers. Construction & Working of Half-wave Folded Dipole This antenna is commonly used with the array type antennas to increase the feed resistance. The most commonly used one is with Yagi-Uda antenna. The following figure shows a half-wave folded dipole antenna. This antenna uses an extra conducting element (a wire or a rod) when compared with previous dipole antenna. This is continued by placing few conducting elements in parallel, with insulation in-between, in array type of antennas. The following figure explains the working of a half-wave folded dipole antenna, whe...
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