GATE ECE 2006 | GATE ECE Year Wise Previous Years Questions

GATE ECE 2006

MCQ (Single Correct Answer)

-0.6

A mast antenna consisting of a 50 meter long vertical conductor operates over a perfectly conducting ground plane. It is base-fed at frequency of 600 kHz. The radiation resistance of the antenna in ohms is

$${{2\,\,{\pi ^2}} \over 5}$$

$${{\,\,{\pi ^2}} \over 5}$$

$${{4\,\,{\pi ^2}} \over 5}$$

$$20\,\,\,{\pi ^2}$$

GATE ECE 2006

MCQ (Single Correct Answer)

-0.6

A rectangular waveguide having $$T{E_{10}}$$ mode as dominant mode is having a cutoff frequency of 18 GHz for the $$T{E_{30}}$$ mode. The inner broad-wall dimension of the rectangular waveguide is

5/3 cms

5 cms

5/2 cms

10 cms

GATE ECE 2006

MCQ (Single Correct Answer)

-0.3

$$\int\int\left(\nabla\times\mathrm P\right)\;\cdot\mathrm{ds}$$ , where is a vector, is equal to

$$\mathrm P\times\nabla\times\mathrm P\;-\;\nabla^2\;\mathrm P$$

$$\nabla^2\;\mathrm P\;+\;\nabla\left(\nabla\cdot\mathrm P\right)$$

$$\nabla^2\;\mathrm P\;+\;\nabla\times\mathrm P$$

$$\nabla\left(\nabla\cdot\mathrm P\right)-\nabla^2\;\mathrm P\;$$

GATE ECE 2006

MCQ (Single Correct Answer)

-0.6

An n-channel depletion MOSFET has following two points on its I_D − V_GS curve:
(i) V_GS = 0 at I_D = 12 mA and
(ii) V_GS = - 6 Volts at I_D = 0
Which of the following Q-points will give the highest trans-conductance gain for small signals?

V_GS = -6 Volts

V_GS = -3 Volts

V_GS = 0 Volts

V_GS = 3 Volts

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