1. Tellegen's theorem is applicable to any lumped network.
2. Reciprocity theorem is applicable to linear bilateral network.
3. Thevenin theorem is applicable to two terminal linear active network.
4. Norton's theorem is applicable to linear active network.

Assertion (A): For a given system only one of the static error constants is finite and significant.

Reason (R): If finite static error constant is large, the loop gain becomes smaller as ω approaches zero.

Assertion (A): Hollow waveguides are frequently used as transmission lines at microwave frequencies.

Reason (R): Waveguide has high power handling capacity, low loss and simple structure.

Assertion (A): Laplace transform can be used to evalute integrals.

Reason (R): Laplace transform can be used to solve differential equations.