1. Tellegen's theorem is applicable to any lumped networks.
2. The reciprocity theorem is applicable to linear bilateral networks.
3. Thevenin's theorem is applicable to two- terminal linear active networks.
4. Norton's theorem is applicable to two-terminal linear active networks.

1. DPSK demodulator requires a device which operates at carrier frequency and provides a delay of bit time T_b
2. In DPSK, synchronous demodulation recovers the signal b(t) and the decoding of b(t) to generate d(t) is done at base band
3. In both DPSK and DEPSK errors always occur in pairs

Match the following:

1. Thermistor is more sensitive than platinum resistance thermometer
2. The resistance of thermistor is solely a function of its absolute temperature whether the source of heat is external or internal
3. Thermistor has linear temperature-resistance relationship
4. Thermistor has linear negative temperature coefficient