Download App

Electronics — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsElectronics1 Mark
Question
In a triode valve (a) If the grid voltage is zero then plate current will be zero(b) If the temperature of filament is doubled, then the thermionic current will also be doubled(c) If the temperature of filament is doubled, then the thermionic current will nearly be four times(d) At a definite grid voltage the plate current varies with plate voltage according to Ohm’s law
 
 
 
 
✓

Answer

(c) If the temperature of filament is doubled, then the thermionic current will nearly be four times

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Electronics→Electronics — all question types→Physics STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

Assertion :  In everyday life the Doppler’s effect is observed readily for sound waves than light waves.
Reason     : Velocity of light is greater than that of sound.(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.
 
 
 
 
→
The self inductance of a motor of an electric fan is 10H. In order to impart maximum power at 50Hz, it should be connected to a capacitance of:
→
Zener diode works on:
→
Two magnets of same size and mass make respectively 10 and 15 oscillations per minute at certain place. The ratio of their magnetic moments is(a) 4 : 9(b) 9 : 4(c) 2 : 3    (d) 3 : 2
       
→
Three capacitors whose capacitances are 2,4 and $\chi_\mu F$ respectively. They are combine first in series and then in parallel. In both the cases the ratio of their equivalents will be :
→
Radioactivity was discovered by (a) Becquerel(b) Pierre Curie(c) Roentgen(d) Rutherford
       
→
In Young's double slit interference experiment, the slit separation is made 3 fold. The fringe width becomes(a) 1/3 times(b) 1/9 times(c) 3 times(d) 9 times
       
→
Energy generation in stars is mainly due to(a) Chemical reactions(b) Fission of heavy nuclei(c) Fusion of light nuclei(d) Fusion of heavy nuclei
   
   
→
An electric dipole is placed at the centre of a sphere then:
→
What physical quantities may $X$  and $Y$  represent ? $(Y$ represents the first mentioned quantity$)$
→