Page 29 - Electrostatics 11

Grade 11 © GC Shiba

22 What do you mean by quantization of charge?
23 What do you mean by charging by conductor and charging by induction?

24 Define one electron volt.

25 If the electric field is zero throughout a certain region of space, is the
potential also zero in the region or not? Explain.

26 A comb run through one's dry hair attracts bits of paper, why?
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27 Prove 1 Vm = 1 NC .
28 Why do sharp edges are strictly avoided in an electrical machine?

29 What is meant by relative permittivity? What is its minimum value?
30 Explain the phenomenon of action point in a charged conical shape.

31 A charged conical conductor loses its charge earlier than a similarly charged

sphere, Why?

32 Why are sharp edges or points avoided in electrical machines?

Long Answer Questions (4 Marks)

☻ Define electric field intensity. Write down its units. Obtain an expression for

electric field due to an electric dipole at a point equidistance from each
charge.

☻ State Gauss law of electrostatics and use it to find the electric field intensity

due to a plane charge conductor.
☻ Define electric potential and derive an expression for it due to point charge.

☻ State and explain Gauss law of electrostatics. Apply it to obtain an

expression for electric field of a linearly charged body.
☻ Are electrical potential and electric field vector quantities? Justify with their

definitions. Also obtain an expression for electrical potential at a point due

to a point charge.
☻ Use Coulomb's law to define potential difference between two points near

a static charge. Also derive expression for it.
☻ State and explain Gauss law of electrostatics with one of its applications.

☻ Define electric field intensity and potential gradient and establish a relation

between them.
☻ What is electrostatic induction? Explain with necessary diagram, a method

of charging a body positively by induction.

29 Electrostatics