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BARC Quiz 12

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Question 1

Consider the electrical network shown in the figure below along with its state equation

The state matrix A is equal to

Question 2

Consider the control system shown below.

For unit step input, the time constant of the system is given by ________ sec.

Question 3

A broadside array consisting of 8 isotropic radiators has directivity of 6dB. Determine the minimum spacing between the elements.

Question 4

Calculate the magnetic flux density at the centre of a current carrying loop when the radius of the loop is 2 cm, loop current is 2 mA and loop is placed in air.

Question 5

A radar operating at 5 GHz uses a common antenna for transmission and reception. The antenna has a gain of 150 and is aligned for maximum directional radiation and reception to a target 1 km away having radar cross-section of