A parallel plate capacitor has its length, width and separation doubled. It fringing effects are neglected, to keep the capacitance same, the dielectric constant must be

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.