Question
Which among the curves shown in Fig. 1.35 cannot possibly represent electrostatic field lines?
✓
Answer
- Figure (a) cannot represent electrostatic field lines since electrostatic field lines start or end only at 90° to the surface of the conductor.
- Figure (b) too cannot represent electrostatic field lines as electrostatic field lines do not start from a negative charge. Electric field lines always traverse from a region of positive charge to a region of negative charge.
- Electrostatic field lines are represented by figure (c).
- Figure (d) cannot represent electrostatic field lines since no two such lines of force can intersect each other.
- As electrostatic field lines cannot form closed loop, therefore figure (d) also does not represent electrostatic field lines.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Energy of electron in hydrogen atom expressed by the following formula :
$E _n=-\left(\frac{13.6 eV}{n^2}\right) ; $ Where $, n=1,2,3, \ldots$ by using this formula, proved that :
$(a)$ The energy of electron $-6.8 eV$ cannot be in $H -$ atom.
$(b)$ The distance of attached lines in spectrum of hydrogen.
→$E _n=-\left(\frac{13.6 eV}{n^2}\right) ; $ Where $, n=1,2,3, \ldots$ by using this formula, proved that :
$(a)$ The energy of electron $-6.8 eV$ cannot be in $H -$ atom.
$(b)$ The distance of attached lines in spectrum of hydrogen.
Draw the labelled circuit diagram of a common-emitter transistor amplifier. Explain clearly how the input and output signals are in opposite phase.
Explain with the help of a diagram, how a depletion layer and barrier potential are formed in a junction diode.
Explain how $p-n$ junction is formed.
→Figure, shows a copper rod joined to a steel rod. The rods have equal length and equal cross sectional area. The free end of the copper rod is kept at $0^\circ C$ and that of the steel rod is kept at $100^\circ C.$ Find the temperature at the junction of the rods. Conductivity of copper ${= 390Wm^{-1}}{^\circ C^{-1}.}$ and that of steel ${= 46Wm^{-1}}{^\circ c^{-1}.}$
→Establish a relation between resistance and resistivity of any substance. Explain in detail, the dependence of resistivity on the temperature.
Two isolated metal spheres A and B have radii R and 2R respectively, and same charge q. Find which of the two spheres have greater energy density just outside the surface of the spheres.
By what fraction does the mass of a boy increase when he starts running at a speed of 12km/h?
A magnifying glass is a converging lens placed close to the eye. A farsighted person uses spectacles having converging lenses. Compare the functions of a converging lens used as a magnifying glass and as spectacles.
The spring shown in figure is unstretched when a man starts pulling on the cord. The mass of the block is M. If the man exerts a constant force F, find
- The amplitude and the time period of the motion of the block,
- The energy stored in the spring when the block passes through the equilibrium position and,
- The kinetic energy of the block at this position.