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
Consider a sample of oxygen at 300K. Find the average time taken by a molecule to travel a distance equal to the diameter of the earth.
How much energy is released in the following reaction?
$\text{ }^7\text{Li + p}\rightarrow\alpha+\alpha.$
Atomic mass of 7Li = 7.0160u and that of 4He = 4.0026u.
→$\text{ }^7\text{Li + p}\rightarrow\alpha+\alpha.$
Atomic mass of 7Li = 7.0160u and that of 4He = 4.0026u.
One end of a steel rod $(\text{K}=46\text{Js}^{-1}\text{m}^{-1}{^{\circ}}\text{C}^{-1})$ of length 1.0m is kept in ice at 0°C and the other end is kept in boiling water at 100°C. The area of cross section of the rod is 0.04cm2. Assuming no heat loss to the atmosphere, find the mass of the ice melting per second. Latent heat of fusion of ice $=3.36\times10^5\text{Jkg}^{-1}.$
→→
A giant refracting telescope at an observatory has an objective lens of focal length 15 m. If an eyepiece lens of focal length 1.0 cm is used, find the angular magnification of the telescope.
If this telescope is used to view the moon, what is the diameter of the image of the moon formed by the objective lens? The diameter of the moon is 3.42 x 106 m and the radius of the lunar orbit is 3.8 x 106 m.
If this telescope is used to view the moon, what is the diameter of the image of the moon formed by the objective lens? The diameter of the moon is 3.42 x 106 m and the radius of the lunar orbit is 3.8 x 106 m.
Prove that the force acting on a current-carrying wire, joining two fixed points a and b in a uniform magnetic field, is independent of the shape of the wire.
A hydrogen atom emits ultraviolet radiation of wavelength 102.5nm. What are the quantum numbers of the states involved in the transition?
Figure shows a rough track, a portion of which is in the form of a cylinder of radius R. With what minimum linear speed should a sphere of radius r be set rolling on the horizontal part so that it completely goes round the circle on the cylindrical part.
Draw a schematic ray diagram of reflecting telescope showing how rays coming from a distant object are received at the eye-piece. Write its two important advantages over a refracting telescope.
Answer the following:
- Name the em waves which are produced during radioactive decay of a nucleus. Write their frequency range.
- Welders wear special glass goggles while working. Why? Explain.
- Why are infrared waves often called as heat waves? Give their one application.