A single layer air cored coil has n turns and inductance L. If a new coil is formed by having 2n turns while keeping the coil length and diameter the same, the new inductance is

Z = R² + X_C² = 50

V = 550 sin(20000 t - 45°)

V = 252 sin(20000 t - 45°)

Chemical properties are governed by valence electrons only.

The firing angle controls the period of conduction and hence average load current.

Maximum data rate for noiseless channel is given by Nyquist Theorem

= 2H log₂ V bits/sec

V - discrete levels (Here Binary i.e. 2)

H - Bandwidth

? Maximum data rate = 2H log₂ V

= 2(3 KHz) log₂ 2 = 2 x 3 x 10³ x 1

= 6 x 10³ = 6000 bps.