Consider the following statements about instrument landing system of aircraft

1. It ensures correct landing under conditions of low visibility.
2. It consists of runaway localizer, glide path equipment and marker beacons.
3. It is basically a blind landing system.

Which of above statements are correct?

Since y is at logic '1' initially, y' must be at logic '1'.

Also, one input of the EXOR gate is tied to zero therefore 'f' will be directly transferred to the output.

The logic gates will introduce gate delays which will lead to the answer .

A Microstrip line has a single dielectric substratc with ground plane on one side and a strip on the other face.

Its special feature is easy access to top surface so that minor adjustments can be made after circuit fabrication.

The high dielectric constant of the substrate reduces guide wavelength and circuit dimensions.

A microstrip line is the most commomly used transmission structure for microwave integrated circuits.

There are three principal quantum numbers.

The electric field intensity inside and outside the cavity are equal.

Orbit is stable only if the two forces are equal and opposite.

Imaginary part of a_e is zero for ? = 0 and ? = ?.