Notifications
Clear all
0
30/09/2020 12:19 pm
Topic starter
If e = 1.60206 x 10-19 C,
e/m = 1.75875 x 1011 Ckg-1
then the mass of electron is
(a) 7.5678 × 10-31 kg
(b) 9.1091 × 10-31 kg
(c) 11.2531 × 10-31 kg
(d) 13.0513 × 10-31 kg
1 Answer
1
30/09/2020 12:22 pm
(b) 9.1091 × 10-31 kg
Explanation:
e/m = 1.75875 x 1011
1.60206 x 10-19/m = 1.75875 x 1011
m = 1.60206 x 10-19/1.75875 x 1011
= 1.60206/1.75875 x 10-30
= 9.1091 × 10-31 kg