2.1 Dargludiad Trydan

Question 1

Cerrynt diffiniad

Answer 1

Cyfradd llif gwefr

Question 2

Uned Gwefr

Answer 2

Coulomb (C)

Question 3

Coulomb (C) diffiniad

Answer 3

Swm o wefr drydanol sy’n llifo heibio pwynt arbennig pan fo cerrynt 1A yn llifo am 1s

Question 4

Gwefr 1 electron

Answer 4

-1.6 x 10^-19

Question 5

1A = x electron yr eiliad

Answer 5

1A = 6 x 10^18 electron/s

Question 6

Hafaliad gwefr ac electronau

Answer 6

Nifer electronau = Cyfanswm gwefr / Gwefr 1 electron (Q/e)

Question 7

Hafaliad cerrynt trydanol (in exam)

Answer 7

I = /\Q / /\t

Question 8

Hafaliad electronau / eiliad

Answer 8

I/e (cerrynt/gwefr 1 electron)

Question 9

I = nAve : diffiniad n

Answer 9

nifer o electronau rhydd mewn uned cyfaint (1m3) - uned m-3

Question 10

I = nAve : diffiniad v

Answer 10

cyflymder drifft electronau

Question 11

I = nAve : diffiniad e

Answer 11

gwefr un electron : 1.6x10-19 C