Download App

Electrostatics — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsElectrostatics1 Mark
Question

Assertion :   The force with which one plate of a parallel plate capacitor is attracted towards the other plate is equal to square of surface density per e per unit area.

Reason     : The electric field due to one charged plate of the capacitor at the location of the other is equal to surface density per e.

(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

(d) If the assertion and reason both are false.

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 Electrostatics→Electrostatics — all question types→Physics STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

Nuclear fusion is common to the pair

(a) Thermonuclear reactor, uranium based nuclear reactor

(b) Energy production in sun, uranium based nuclear reactor

(c) Energy production in sun, hydrogen bomb

(d) Disintegration of heavy nuclei, hydrogen bomb
→

A double convex lens of glass of m = 1.5 has radius of curvature of each of its surface is 0.2 m.  The power of the lens is

(a) + 10 dioptres

(b) – 10 dioptres

(c) – 5 dioptres

(d)  +5 dioptres
→
Lenz's law is a consequence of the law of conservation of:
→

If  be the electric field strength of a short dipole at a point on its axial line and  that on the equatorial line at the same distance, then

(a)  

(b)  

(c)  

(d) None of the above
→
Particles which can be added to the nucleus of an atom without changing its chemical properties are called:
→
The arrangement fo two magnetic poles of equal and opposite strengths separated by a finite distance is called:
→
A long, straight wire carries a current along the z-axis, One can find two points in the x−yplane such that:
→
An electron of charge e moves parallel to uniform lines of force in magnetic field B with velocity v. Force acting on electron is :
→

Radius of  nucleus is 3 Fermi. The radius of  nucleus will be

(a) 5 Fermi

(b) 6 Fermi

(c) 11.16 Fermi

(d) 8 Fermi
→
If the external force acting on a system have zero resultant, the centre of mass:
  1. Must not move.
  2. Must not accelerate.
  3. May move.
  4. May accelerate.
→