Figure shows the electric field lines around three point charges A, B and C.
(i) Which charges are positive? (ii) Which charge has the largest magnitude? Why? (iii) In which region or regions of the picture could the electric field be zero? Justify your answer. (a) Near A (b) Near B (c) Near C (d) Nowhere
This is a Short Answer Type Questions as classified in NCERT Exemplar
Explanation-The electric lines of forces always starts from a positive charge and ends at a negative charge. In case of a single isolated charge, electric lines of force start from positive charge ends at infinity.
(i) Here, in the figure, the electric lines of force starts from A and C. Therefore, charges A and C must be positive.
(ii) The number of electric lines of forces starting from charge C are maximum, so C must have the largest magnitude.
(iii) From the figure we see that a neutral point exists between charges A and
Here, more number of elect
...more
This is a Short Answer Type Questions as classified in NCERT Exemplar
Explanation-The electric lines of forces always starts from a positive charge and ends at a negative charge. In case of a single isolated charge, electric lines of force start from positive charge ends at infinity.
(i) Here, in the figure, the electric lines of force starts from A and C. Therefore, charges A and C must be positive.
(ii) The number of electric lines of forces starting from charge C are maximum, so C must have the largest magnitude.
(iii) From the figure we see that a neutral point exists between charges A and
Here, more number of electric lines of forces shows higher strength of charge C than A. Thus, electric field is zero near charge A hence neutral point lies near A.
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<p>This is a Short Answer Type Questions as classified in NCERT Exemplar</p><p><strong>Explanation-</strong>The electric lines of forces always starts from a positive charge and ends at a negative charge. In case of a single isolated charge, electric lines of force start from positive charge ends at infinity.</p><p><strong> (i) </strong>Here, in the figure, the electric lines of force starts from A and C. Therefore, charges A and C must be positive.</p><p><strong> (ii) </strong>The number of electric lines of forces starting from charge C are maximum, so C must have the largest magnitude.</p><p><strong> (iii)</strong> From the figure we see that a neutral point exists between charges A and </p><p>Here, more number of electric lines of forces shows higher strength of charge C than A. Thus, electric field is zero near charge A hence neutral point lies near A.</p>
The following are the topics covered in this chapter: Electric Field and Field Lines, Gauss's Law, Electric Dipole, Conductors and Insulators, and Electric Flux.
Indeed, it is an easy chapter of Class 12 Physics. In this chapter, you will learn about the foundational concepts like Gauss's law and electric fields.
In the medical entrance test NEET, this chapter has a moderate weightage. You can expect around 2-3 questions of this chapter that contributes to the 3-5% of the total marks in the Physics section.
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