Valve Electroni...

The amplification factor of a triode is 50. If the grid potential is decreased by 0.20V. What increase, in plate potential will keep the plate current unchanged?

The slope of plate characteristic of a vacuum diode is 2×10⁻²mA/V. The plate resistance of diode will be

The transconductance of a triode amplifier is 2.5 mili mho having plate resistance of 20 kΩ, amplification 10. Find the ,load resistance

The amplification factor of a triode is 18 and its plate resistance is 8×10Ω. A load resistance of 104 Ω is connected in the plate circuit. The voltage gain will be

The ripple factor in a half wave rectifier is

The plate resistance of a triode is 2.5×10⁴Ω and mutual conductance is 2×10⁻³ mho. What will be the value of amplification factor

Plate voltage of a triode is increase from 200 V to 225 V. To maintain the plate current, change in gride voltage from 5 V to 5.75 V is needed. The amplification factor is

The current in a triode at anode potential 100 V and grid potential - 1.2 V is 7.5 mA. If grid potential is changed to −2.2 V, the current becomes 5.5 mA, the value of trans conductance (g) will be

Select the correct statement

In a diode value the cathode temperature must be (ϕ= work function)