electric charges and fields

Question 1

q(e)=?

Answer 1

1.6×10-¹⁹

Question 2

specific charge formula

Answer 2

q/m

Question 3

specific charge of a proton

Answer 3

9.6×10⁷ C/Kg

Question 4

if a glass slab is placed between 2 charges in vacuum then the force between them decreases/increases/unchanged/none

Answer 4

decreases (by K)

Question 5

three equal charges ‘q’ are placed at corners of an equilateral triangle, what is the electric field at centre?

Answer 5

zero

Question 6

charge is _ of speed (independent/dependent)

Answer 6

independent

Question 7

does mass depend on speed?

Answer 7

yes

Question 8

how does charging by friction take place?

Answer 8

on rubbing, KE is produced which converts into thermal energy and ionises electrons

Question 9

coloumbs formula (vector)

Answer 9

Kq1q2(r1-r2)/(r1-r2)³

Question 10

for a symmetrical charge distribution, Net force at centre is?

Answer 10

0

Question 11

formula to find where a charge should be kept between 2. opp. charges

Answer 11

x=root q1/(root q2+root q1)
q1=> smaller charge

Question 12

relationship bw Fo, Fm, Em, Eo

Answer 12

Fo/Fm=Er=Em/Eo

Question 13

general formula for E due to symmetric charge distribution (arc)

Answer 13

2klambdasin(alpha/2)/R

Question 14

more deflection, _ charge to mass ratio

Answer 14

more

Question 15

direction of electric field

Answer 15

positive to negative

Question 16

dipole moment formula

Answer 16

q2l

Question 17

electric field axial point

Answer 17

2KP/r³

Question 18

torque electric field formula

Answer 18

P×E

Question 19

E due to uniform infinite charged wire

Answer 19

Lambda/2piEoR

Question 20

E inside conducting cylinder

Answer 20

0

Question 21

E due to plane sheet of charge

Answer 21

Sigma/2Eo

Question 22

E outside conducting sphere

Answer 22

KQ/r2