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Chapter One
ELECTRIC CHARGES
AND FIELDS
1.1 INTRODUCTION
Question 1
Define electrostatic?
Ans:-
Electrostatics deals with
the study of forces, fields and potentials arising from
static charges.
Question 2
Who coined the term electricity?
Ans:-
The name electricity is coined from the Greek word
elektron meaning amber.
Question 3
Meaning of polarity of charges
Ans:-
The property which differentiates the two kinds of charges is called
the polarity of charge.
Question 4
Who gave the name positive and negative charges?
Ans:-
The charges were named
as positive and negative by the American scientist Benjamin Franklin.
Question 5
Gain of electrons means
Ans:- negative charge
Question 6
loss of electrons means
Ans:- positive charge
Question 7
Use of golden leaf electroscope
Ans:-
A simple apparatus to detect charge on a body is the gold-leaf electroscope
Question 8
What are conductor?
Ans:-
Those which allow electricity to pass through them easily are called conductors.
Question 9
What are insulators?
Ans:-
Most of the non-metals like glass, porcelain, plastic, nylon, wood offer high resistance to the passage of
electricity through them. They are called insulators.
Question 10
Charge on 1electron
Ans:- e = 1.602192 × 10–19
Question 11
Number of electrons containing In 1 coulomb of charge
Ans:-
There are about 6 × 10^18 electrons in a charge of 1C
Question 12
Principal of superposition
Ans:- , it is verified that force on any charge due to a number of other charges is the vector sum of all the forces This is termed as the principle of superposition.
Question 13
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