Recent questions tagged electric current through gases

+1 vote

1 answer

If the plate resistance of a triode is 3.3 x 10^-3 Ω and its mutual conductance is 3 x 10^3 mho, then the amplification factor is nearly equal to

asked Mar 24, 2019 in Class 12 by kratos

+3 votes

1 answer

Name the current carries in metals (solid conductors), / electrolytic solutions (liquid conductors) and /discharge tubes (gaseous conductors).

asked Mar 23, 2019 in JEE by kratos

+1 vote

1 answer

Calculate the amplification factor of a triode valve which has plate resistance of 2kΩ and transconductance of 2millimho.

asked Mar 19, 2019 in Class 12 by kratos

+2 votes

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The mean free path of electrons in the gas in a discharge tube is inversely proportional to the pressure inside it.

asked Mar 9, 2019 in Class 12 by kratos

+2 votes

1 answer

The current conduction in a discharge tube is due to - (1) Electrons only (2) +ve ions and –ve ions

asked Mar 7, 2019 in Class 12 by kratos

+1 vote

1 answer

If waves in an ocean travel with a phase velocity , vp = Aλ^-1/2 then the group velocity vg of the wave packet’ of these waves is

asked Feb 27, 2019 in Class 12 by kratos

+3 votes

1 answer

If the plate resistance of triode valve is 13 x 10^6 Ω and amplification factor is 21. The mutual conductance will be

asked Feb 17, 2019 in Class 12 by kratos

+2 votes

1 answer

1 mole of H2 gas is contained in a box of volume V = 1.00 m3 at T = 300K. The gas is heated to a temperature of T = 3000K and the gas

asked Jan 28, 2019 in Class 12 by kratos

+1 vote

1 answer

The plate current, plate voltage and grid voltage of a 6F6 triode tube are related as ip- 41(Vp + 7Vg)^1.41

asked Jan 18, 2019 in Class 12 by kratos

+2 votes

1 answer

A discharge tube contains helium at r, low pressure. A large potential difference is applied across the tube.

asked Jan 13, 2019 in Class 12 by kratos

+1 vote

1 answer

When the hydrogen gas is taken inside discharge tube the deflection will be maximum give season.

asked Jan 3, 2019 in Physics by kratos

+1 vote

1 answer

Because of the space charge in a diode valve, (a) the plate current decreases

asked Dec 25, 2018 in Class 12 by kratos

+3 votes

1 answer

Electric conduction takes place in a discharge tube due to the movement of (a) positive ions

asked Dec 21, 2018 in Class 12 by kratos

+3 votes

1 answer

The plate current in a diode is zero. It is possible that (a) the plate voltage is zero

asked Dec 13, 2018 in Class 12 by kratos

+2 votes

1 answer

The plate current in a triode valve is zero. The temperature of the filament is high.

asked Dec 10, 2018 in Class 12 by kratos

+1 vote

1 answer

The constant A in the Richardson-Dushman equation for tungsten is 60 x 10^4A/m^2-K^2.

asked Dec 7, 2018 in Class 12 by kratos

+1 vote

1 answer

Let i0 be the thermionic current from a metal surface when the absolute temperature of the surface is T0.

asked Dec 5, 2018 in Class 12 by kratos

+1 vote

1 answer

The plate current in a triode can be written as ip = k[Vg + Vp/μ]^3/2 .

asked Nov 27, 2018 in Class 12 by kratos

+1 vote

1 answer

Cathode rays constitute a stream of (a) electrons

asked Nov 27, 2018 in Class 12 by kratos

+3 votes

1 answer

A diode, a resistor and a 50Hz AC source are connected in series.

asked Oct 21, 2018 in Class 12 by kratos

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