Download App

Electric Charges and Fields — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsElectric Charges and Fields1 Mark
MCQ
Quantisation of charge was experimentally demonstrated by:
  • A
    Einstein’s photoelectric effect.
  • B
    Frank-Hertz experiment.
  • C
    Davisson and Germer experiment.
  • D
    Millikan’s oil drop experiment.
✓

Answer

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 [1M]" from Electric Charges and Fields→Electric Charges and Fields — all question types→Physics STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

The magnetic compass is not useful for navigation near the magnetic poles because

(a) The magnetic field near the poles is zero

(b) The magnetic field near the poles is almost vertical

(c) At low temperature, the compass needle looses its magnetic properties

(d) Neither of the above
→
Two concave lenses L1 and L2 are kept in contact with each other. If the space between the two lenses is filled with a material of refractive index $\mu\approx1,$ the magnitude of the focal length of the combination:
  1. Becomes undefined.
  2. Remains unchanged.
  3. Increases.
  4. Decreases.
→

One microgram of matter converted into energy will give

(a) 90 J

(b) 9  J

(c) 9 J

(d) 9  J
→
Which is the lightest element in the universe?
→
When the energy of the incident radiation is increased by 20%, the kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5eV to 0.8eV. The work function of the metal is?
→

The contribution in the total current flowing through a semiconductor due to electrons and holes are   and   respectively. If the drift velocity of electrons is   times that of holes at this temperature, then the ratio of concentration of electrons and holes is

(a) 6 : 5

(b) 5 : 6

(c) 3 : 2

(d) 2 : 3
→

Which one of the following statements is not correct

(a) A diode does not obey Ohm's law

(b) A PN junction diode symbol shows an arrow identifying the direction of current (forward) flow

(c) An ideal diode is an open switch

(d) An ideal diode is an ideal one way conductor

→

In case of a virtual and erect image, the magnification created by the mirror is:

→

The refractive index of the material of the prism and liquid are 1.56 and 1.32 respectively.  What will be the value of q for the following refraction

(a) sinθ  ≥

(b) sinθ ≥

(c) sinθ ≥

(d) sinθ ≥

→
An intrinsic semiconductor is:
→