Match the following:

1. N type semiconductor with work function φ_s more than work function φ_M of metal
2. N type semiconductor with work function φ_s less than work function φ_M of metal
3. P type semiconductor with work function φ_s more than work function φ_M of metal
4. P type semiconductor with work function φ_s less than work function φ_M of metal.

1. B = 0
2. μ_r is high
3. diamagnetism is high
4. transition temperature varies with isotopic mass.

1. In BPSK we deal individually with each bit of duration T_b
2. In QPSK we lump two bits to form a symbol
3. In both BPSK and QPSK signal changes occur at bit rate
4. In QPSK the symbol can have any one of four possible values

1. It is suitable for direction finding application
2. It is a single turn or multiturn coil carrying RF current
3. The loop is surrounded by a magnetic field everywhere perpendicular to the loop