Question
The charge density of a cone shaped object will be maximum:

Answer

(b)at the top

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

Five resistors are connected as shown in the diagram. The equivalent resistance between  $A$  and  $B$ is
What is the time taken $($in seconds$)$ to cross a glass of thickness $4\ mm$ and $\mu = 3$ by light
The oscillating electric and magnetic vectors of an electromagnetic wave are oriented along:
Two metal spheres of radii $R_1$ and $R _2$ are charged to the same potential. The ratio of charges on the spheres is
Two thin lenses of focal lengths $f_2$ and $f_2$ are in contact and coaxial. The combination is equivalent to a single lens of power
The diffraction effect can be observed in(a) Only sound waves(b) Only light waves(c) Only ultrasonic waves (d) Sound as well as light waves
   
   
A heavy ring of mass m is clamped on the periphery of al light circular disc. A small particle having equal mass is clamped at the centre of the disc. The system is rotated in such a way that the centre moves in a circle of radius r with a uniform speed v. We conclude that an external force:
  1. $\frac{\text{mv}^2}{\text{r}}$ must be acting on the central particle.
  2. $\frac{2\text{mv}^2}{\text{r}}$ must be acting on the central particle.
  3. $\frac{2\text{mv}^2}{\text{r}}$ must be acting on the system.
  4. $\frac{2\text{mv}^2}{\text{r}}$ must be acting on the ring.
One serious drawback of semi-conductor devices is:
Consider the situation shown in the figure. The capacitor $A$ has a charge 4 on it whereas $B$ is uncharged. The charge appearing on the capacitor $B$ a long time after the switch is closed is
What is the stopping potential when the metal with work function 0.6 eV is illuminated with the light of 2 eV (a) 2.6 V(b) 3.6 V (c) 0.8 V   (d) 1.4 V