In cosmic rays 0.15 protons cm-2s-1 are entering the earth's atmosphere. If the radius of the earth is 6400 km, the current received by the earth in the form of cosmic rays is nearly.

Question

In cosmic rays 0.15 protons cm-2s-1 are entering the earth's atmosphere. If the radius of the earth is 6400 km, the current received by the earth in the form of cosmic rays is nearly. (A) 0.12 A (B) 1.2 A (C) 12 A (D) 120 A

Tardigrade Admin · Accepted Answer

Surface area of earth, A=4π r2 Charge entering the earth per sec per unit area J=0.15×1.6×10-19 C cm-2s-1 =0.15×1.6×10-19×104 C m-2s-1 Current I=JA=J 4π r2 =0.15×1.6×10-19×104×4×3.14×(6.4×106)2 =0.12 A.

Q. In cosmic rays $0.15$ protons $c m^{- 2} s^{- 1}$ are entering the earth's atmosphere. If the radius of the earth is $6400 km$ , the current received by the earth in the form of cosmic rays is nearly.

$0.12 A$

$1.2 A$

$12 A$

$120 A$

Q. In cosmic rays 0.15 protons cm−2s−1 are entering the earth's atmosphere. If the radius of the earth is 6400km, the current received by the earth in the form of cosmic rays is nearly.

0.12A

1.2A

12A

120A

Surface area of earth, A=4πr2 Charge entering the earth per sec per unit area J=0.15×1.6×10−19Ccm−2s−1 =0.15×1.6×10−19×104Cm−2s−1 Current I=JA=J4πr2 =0.15×1.6×10−19×104×4×3.14×(6.4×106)2 =0.12A.

Q. In cosmic rays $0.15$ protons $c m^{- 2} s^{- 1}$ are entering the earth's atmosphere. If the radius of the earth is $6400 km$ , the current received by the earth in the form of cosmic rays is nearly.

$0.12 A$

$1.2 A$

$12 A$

$120 A$