electric charge

Question 1

1) 導電體的英文
2) 絕緣體的英文
3) 分子的英文
4) 半導體的英文
5) 超導體的英文

Answer 1

1) conductor
2) insulator
3) atom
4) semiconductor
5) superconductor

Question 2

what are atom consist of?

Answer 2

positively charge protons,
negatively charge electrons
and electrically neutral neutrons.

Question 3

what is semiconductor?

Answer 3

intermediate between conductors and insulators.

Question 4

what is superconductor?

Answer 4

perfect conductor, allowing charge to move without any hindrance

Question 5

The characteristic of electric charge

Answer 5

charges of same sign repel;

charges of opposite signs attract.

Question 6

Coulomb’s Law fomular

Answer 6

F = ( k q1 q2 ) / r^2 (C)

Question 7

k

Answer 7

k = 1 / ( 4 π ε0 )

Question 8

Coulomb’s Law

Answer 8

is an experimental law of physics that quantifies the amount of force between two stationary[靜止的], electrically charged particles.

Question 9

explain F12

Answer 9

force acting on particle 1 due to the presence of particle 4, etc.

Question 10

Shell theorem in electrostatics

Answer 10

1) a spherical shell of uniform charge attract or repels a charged particle outside the shell as if all shell’s charge were concentrated at the center.
2) a charged particle inside a spherical shell of uniform charged experiences no force.

Question 11

force acting on particle 1 by n charged particle

Answer 11

F 1,net = F 12 + F 13 + F 14 +……

Question 12

charge is quantized

Answer 12

q = ne ( n = ±1, ±2, ±3…… )

Question 13

what is e = 1.602 × 10 ^(-19) ?

Answer 13

the magnitude of the charge of both the proton and the electron

Question 14

current

Answer 14

the rate of charge moves past a point or thought a region