IIT JAM
Himanshu Pandey Asked a Question
May 30, 2020 3:09 ampts 30 pts
  • IIT JAM
  • Physics (PH)

Electricity theory

Kindly clear me these basics Q 1) why to the electric field lines between two negative charges is not possible.!!!! Q 2) why electric field can't be negative??? Q 3) what's the difference among test charge ,point charge and unit charge???
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  • Himanshu Pandey
    AS your answer and logic i completely understand
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    Abhishek singh
    That's great! Stick to that idea only. Abandon the book where you find such mistakes!
  • Himanshu Pandey
    Abhishek sir regarding first question can we not draw field lines like in this fig, ?????in very few cases i found this diagram but most places it is said impossible to draw.
    • cropped6467654243764132600.jpg
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    Abhishek singh
    it's impossible to draw like that. the straight line joined is sure a typo or the Author had done a big mistake!
  • Abhishek singh
    3) A test charge is a positive charge of very small magnitude which gives the direction and strength of electric field in space without influencing the electric field, whereas a po...
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  • Abhishek singh Best Answer
    2) Your second question should be a general one! what I mean by that? I mean this question is valid for all vector (not just electric field vector). Vectors are never positive or n...
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    Abhishek singh
    any discussion would be appreciated!
  • Abhishek singh thankyou
    your first question is interesting one. it took me almost a minute to think of it (that how could I make you to understand this). Now I am sharing my thoughts with you. let say you...
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    Abhishek singh
    you may still ask doubts.
  • Dhairya sharma
    dear I hv already attached see that.
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  • Dhairya sharma
    answer 2.... An electric field is neither positive or negative. It is defined as being the force acting per unit positive charge . (This means it is a vector like force is). The d...
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    Dhairya sharma
    Test charge and point charge are synonymous in the sense that both are unit positive charges. ... a point charge is the one with dimensions so much smaller than the other dimension...
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  • Chandra dhawan thankyou
    answer 3.. Point charge: Any charge whether positive or negative, whose electric field is to be found at a particular distance(point) is called point charge. Test charge: Any char...
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    Chandra dhawan
    Test charge and point charge are synonymous in the sense that both are unit positive charges. ... a point charge is the one with dimensions so much smaller than the other dimension...
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  • Chandra dhawan
    answer 2.... An electric field is neither positive or negative. It is defined as being the force acting per unit positive charge . (This means it is a vector like force is). The d...
    Show more
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