Download App

Electronics — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsElectronics1 Mark
Question
Assertion :  Electron has higher mobility than hole in a semiconductor.
Reason     : Mass of electron is less than the mass of hole. (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.
 
 
 
 
✓

Answer

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.

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

The slit of a collimator is illuminated by a source as shown in the adjoining figures. The distance between the slit $S$ and the collimating lens $L$ is equal to the focal length of the lens. The correct direction of the emergent beam will be as shown in figure
→
Assertion :   In meter bridge experiment, a high resistance is always connected in series with a galvanometer.
Reason     : As resistance increases current through the circuit increases.(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.
 
 
 
 
→
Wave which cannot travel in vacuum is(a) X-rays  (b) Infrasonic(c) Ultraviolet(d) Radiowaves
       
→
Two parallel wires carry currents of 20A and 40A in opposite directions. Another wire carying a current anti parallel to 20A is placed midway between the two wires. T he magnetic force on it will be:
  1. Towards 20A.
  2. Towards 40A.
  3. Zero.
  4. Perpendicular to the plane of the currents.
→
Two capacitors of capacitance 2 μF and 3μF  are joined in series. Outer plate first capacitor is at 1000 volt and outer plate of second capacitor is earthed (grounded). Now the potential on inner plate of each capacitor will be(a) 700 Volt(b) 200 Volt(c) 600 Volt(d) 400 Volt
       
→
Let $F_{pp,} F_{pn}$ and $F_{nn}$ denote the magnitudes of the net force by a proton on a proton, by a proton on a neutron and by a neutron on a neutron respectively. Neglect gravitational force. When the separation is $1\ fm:$
→
A $50$ ohm galvanometer gets full scale deflection when a current of $0.01\ A$ passes through the coil.  When it is converted to a $10\ A$ ammeter, the shunt resistance is
→
Which is the wrong statement in following sentences? A device in which P and N-type semiconductors are used is more useful then a vacuum type because(a) Power is not necessary to heat the filament(b) It is more stable 
(c) Very less heat is produced in it(d) Its efficiency is high due to a high voltage across the junction
 
 
 
 
→
In the circuit shown in the figure, the current through
→
The power of an achromatic convergent lens of two lenses is + 2D. The power of convex lens is + 5D. The ratio of dispersive power of convex and concave lens will be (a) 5 : 3   (b) 3 : 5(c) 2 : 5    (d) 5 : 2
       
→