Question
  1. An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks. Why not?
  2. Explain why two field lines never cross each other at any point?

Answer

  1. An electrostatic field line is a continuous curve because a charge experiences a continuous force when traced in an electrostatic field. The field line cannot have sudden breaks because the charge moves continuously and does not jump from one point to the other.
  2. If two field lines cross each other at a point, then electric field intensity will show two directions at that point. This is not possible. Hence, two field lines never cross each other.

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

Write the importance of Huygens principle. What are the two assumptions of this theory?
$a$. An electron moving horizontally with a velocity of $4 \times 10^4 m / s$ enters a region of uniform magnetic field of $10^{-5} T$ acting vertically upward as shown in the figure. Draw its trajectory and find out the time it takes to

Image

$b$. A straight wire of mass $200 g $and length $1.5\ m$ carries a current of $2 A$. It is suspended in mid air by a uniform magnetic field $B$. What is the magnitude of the magnetic field?
Explain ferromagnetism and ferromagnetic substances.
A tuning fork produces $4$ beats per second with another tuning fork of frequency $256\ Hz.$ The first one is now loaded with a little wax and the beat frequency is found to increase to 6 per second. What was the original frequency of the tuning fork?
The average kinetic energy of molecules in a gas at temperature $T$ is $1.5\ kT.$ Find the temperature at which the average kinetic energy of the molecules of hydrogen equals the binding energy of its atoms. Will hydrogen remain in molecular from at this temperature? Take $k = 8.62 \times 10^{-5}eV\ K^{-1}.$
Distinguish between the terms ‘effective value’ and peak value of alternating current.
Two dielectric blocks (whose dielectric constants are $K_1$ and $K_2$, respectively) are filled between the plates of a parallel plate capacitor as shown in the figure. What will be the capacitance of the capacitor?
Image
A person wears glasses of power -2.5D. Is the person farsighted or nearsighted? What is the far point of the person without the glasses?
Explain resonance for $L-C-R$ series $A C$ circuit. Obtain the equation of resonance frequency and explain resonance curve.
If an object far away from a convex mirror moves towards the mirror, the image also moves. Does it move faster, slower or at the same speed as compared to the object?