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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A beam contains 2.0 × 10^8 doubly charged positive ions per cubic centimeter, all of which are moving toward north with a speed of 1.0×10^5 m/s. (a) what are the magnitude and direction of the current density J→? (b) can you calculate the total current i in this ion beam? If not what additional informaiton in needed.

A beam contains 2.0 × 10^8 doubly charged positive ions per cubic centimeter, all of which are moving toward north with a speed of 1.0×10^5 m/s. (a) what are the magnitude and direction of the current density J→? (b) can you calculate the total current i in this ion beam? If not what additional informaiton in needed.

A beam contains 2.0 × 10^8 doubly charged positive ions per cubic centimeter How many electrons per second pass through a section of wire carrying a current of 0.7 A?