Number 4 and number 7 question is doubt â ‹Q4 Calculate the average drift velocity of conduction - Physics - Current Electricity

Question

Number 4 and number 7 question is doubt

â€‹Q4 Calculate the average drift velocity of
conduction electrons in a copper wire of cross-sectional area 1 0
× 10– 7 m2 , carrying
a current of 1 5 A Assume that each copper atom contributes roughly
one conduction electron The density of copper is 9 ×
105 kg m–3, the atomic weight 63 5 and
Avogndre's number is 6 023 × 1023 per mole
[Ans 1 1 × 10–3 ms –1]

Q7 In the Bohr model of hydrogen atom, the electron makes about 0 6
× 1016 rev s–1 around the nucleus
What is the average current at a point on the orbit of electron ? e
= 1 59 × 10–19 C
â€‹ [Ans 0 954 m A]

Shobhit Mittal · Accepted Answer

Dear Student,

solving 7 can solve one at a time 0
6*1016 rev/s time period=10 6*1016=1
67*10-16 se=1
59*10-19 C average current =charge flow in one revTime period=1
6*10-191 67*10-16=0 954 mAregards