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HC Verma - Concepts of Physics Part 2

29. Electric Field and Potential

23. Heat and Temperature
24. Kinetic Theory of Gases
25. Calorimetry
26. Laws of Thermodynamics
27. Specific Heat Capacities of Gases
28. Heat Transfer
29. Electric Field and Potential
30. Gauss’s Law
31. Capacitors
32. Electric Current in Conductors
33. Thermal and Chemical effects of Electric Current
34. Magnetic Field
35. Magnetic Field due to a Current
36. Permanent Magnets
37. Magnetic Properties of Matter
38. Electromagnetic Induction
39. Alternating Current
40. Electromagnetic Waves
41. Electric Current through Gases
42. Photoelectric Effect and Wave-Particle Duality
43. Bohr’s Model and Physics of the Atom
44. X-rays
45. Semiconductors and Semiconductor Devices
46. The Nucleus
47. The Special Theory of Relativity

Short Answer

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Objective I

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Objective II

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Exercises

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Q. 24.5( 8 Votes )

A point charge is brought in an electric field. The electric field at a nearby point.
A. will increase if the charge is positive

B. will decrease if the charge is negative

C. may increase if the charge is positive.

D. may decrease if the charge is negative.

Class 12th HC Verma - Concepts of Physics Part 2 29. Electric Field and Potential

Answer :

Option (c) is correct:

In an electric field, if a positive charge is placed, then the charge itself will generate some electric field on its own diverging from the point.

At a nearby point Q (towards the direction of external field), the field will increase as the field lines from the charge will also add to external field lines.

At a nearby point P (away from the direction of external field), the field will decrease as the field lines from the charge will cancel some of the external field lines.

Therefore, at a nearby point, field can either increase or decrease.

Option (d) is correct:

In an electric field, if a negative charge is placed, then the charge itself will generate some electric field on its own converging to the point.

At a nearby point Q (towards the direction of external field), the field will decrease as the field lines from the charge will cancel some of the external field lines.

At a nearby point P (away from the direction of external field), the field will increase as the field lines from the charge will add on to the external field lines.

Therefore, at a nearby point, field can either increase or decrease.

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