A triod has plate characteristies in the from of purallet lines in the region of our interest At a given in terms of platevoltage V (in volts ) by the algebraic relation
`1 = 0.125V - 7.5`
for grid of - 3 volts is 5 millanpers , determine the plate resistance of(r_(p)) transcondutance (g)and the arrplfication facter (u) for the trid

The plate current, plate voltage and grid voltage of a 6F6 triode tube are related as i_p = 41 (V_p + 7 V_g)^(1.41) where V_p and V_g are in volts and i_p in microamperes. The tube is operated at V_p = 250 V, V_g = -20 V . Calculate (a) the tube current, (b) the plate resistance, (c) the mutual conductance and (d) the amplification factor.

The plate current, plate voltage and grid voltage of a 6F6 triode tube are related as i_p = 41 (V_p + 7 V_g)^(1.41) where V_p and V_g are in volts and i_p in microamperes. The tube is operated at V_p = 250 V, V_g = -20 V . Calculate (a) the tube current, (b) the plate resistance, (c) the mutual conductance and (d) the amplification factor.

In the circuit of a triode valve, there is no change in the plate current, when the plate potential is increased from 200 volt to 220 volt and the grid potential is decreased from -0.5 volt to -1.3 volt . The amplification factor of this valve is

A parallel plate capacitor with circular plates of radius 1m has a c apacitance of 1n F. At t=0, it is connected for charging in series with a resistance R=1MOmega across2V battery . Calculate the magnetic field at a point P, in between the plates and half way between the centre and the periphery of the plates after 10^(-3)s.