MCQ
A circular ring carries a uniformly distributed positive charge. The electric field $(E) $ and potential $ (V) $ varies with distance $(r)$ from the centre of the ring along its axis as
  • A


  • C

  • D

Answer

Correct option: B.

b

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

Similar questions

Angle of a prism is $30^{\circ}$ and its refractive index is $\sqrt{2}$ and one of the surface is silvered. At what angle of incidence, a ray should be incident on one surface so that after reflection from the silvered surface, it retraces its path
A scooter starting from rest moves with a constant acceleration for a time $\triangle\text{t}_1,$ then with a constant velocity for the next $\triangle\text{t}_2,$ and finally with a constant deceleration for the next $\triangle\text{t}_3$ to come to rest. $A\ 500N$ man sitting on the scooter behind the driver manages to stay at rest with respect to the scooter without touching any other part. The force exerted by the seat on the man is:
An object placed $10 cm$ in front of a lens has an image $20 cm$ behind the lens. What is the power of the lens (in dioptres)
Which of the following particle will experience maximum acceleration when projected with same speed in transverse magnetic field
Hydrogen (H), deuterium (D), singly ionized helium ($He^+$) and doubly ionized lithium (Li) all have one electron around the nucleus. Consider n =2 to n = 1 transition. The wavelengths of emitted radiations are $\lambda 1,\lambda 2, \lambda 3$ and $\lambda 4$ respectively. Then approximately
At ordinary temperatures, the electrical conductivity of semi conductors in $mho/mete{\rm{r}}$ is in the range
For the production of $X-$ rays, the target should be made of
If half-life of a substance is 3.8 days and its quantity is 10.38 gm. Then substance quantity remaining left after 19 days will be
The correct order of ionizing capacity of $\alpha ,\;\beta $ and $\gamma - $ rays is
A man $160\,cm$ high stands in front of a plane mirror. His eyes are at a height of $150\,cm$ from the floor. Then the minimum length of the plane mirror for him to see his full length image is......$cm$