Page 28 - Electrostatics 11
P. 28
Grade 11 © GC Shiba
Short Questions ( 2 Marks)
1 Why metallic chain is used in the tanker transporting highly inflammable
liquid?
2 Is it possible that electric potential at a point is zero but not electric field?
3 How can a body be charged with positive electricity by the method of
induction? Explain.
4 What is the magnitude of an electric field which will balance the weight of
an electron on the surface of earth?
5 Can two electric lines of force ever intersect? Explain.
6 Different charges q 1, q 2, ... are placed at r 1, r 2, ... respectively in an
electrostatic field. Write expressions for the total electric potential and
intensity at R in proper notations. r1, r2, ... and R refer to the distances from
the origin of the field (space).
7 Define and write the unit of potential gradient in an electrostatic field.
8 Explain how a pith ball can be electrified with positive or negative charge.
9 What is potential gradient? How is it related with the electric field intensity?
10 Can a charged body attract an uncharged body?
11 A man inside an insulated metallic cage does not receive shock when the
cage is highly charged, why?
12 Why does body get electrified when they are rubbed together for a while?
13 What is electrostatic shielding?
14 Two charged conductors are touched mutually and then separated. What
will be the charge on them?
15 How can a neutral body be charged with negative electricity by induction?
16 Two electric lines of force never intersect each other. why?
17 The tyres of airplane are made from a special rubber which is reasonably
good conductor of electricity. What would be the reason behind it?
18 More charge can be stored on a metal if it is highly polished that when its
surface is rough. Explain.
19 Why are the four-footed animals posed to more threat during close by
lightning strikes than the two footed humans?
20 Why is it dangerous to take shelter under a tall tree during lightening?
21 Sharp projections are avoided in machines, why?
28 Electrostatics
