Electric charges and field

Question 1

gold leaf electroscope

Answer 1

device used for detecting an electrical charge

Question 2

additive nature of electric charge

Answer 2

total charge of a system is the algebraic sum of all individual charges located at different point inside it

Question 3

Quantization of electric charge

Answer 3

total chrge of a body is always an integral multiple of a basic quantum charge
q=ne

Question 4

conservation of charge

Answer 4

1)total charge of an isolated system remains constant
2)the electric charge can neither be created nor be destroyed,they can only be transfered

Question 5

coulomb’s law

Answer 5

force of attraction or repulsion is directly proportional
1) to product of magnitude of charges (q1xq2)
2)inversely proportional to square of distance between them(1/r^2)

Question 6

principal of superposition

Answer 6

when no of charges are interacting ,then the total force is given by vector addition
F=root(f1^2+f2^2+2f1f2 cos theta)