A stream of singly charged ions is ejected from the sun with a number density of 8.70 cm-3. The stream travels at a speed of 470.0 km/s until it strikes the circular face of a spacecraft which has a radius of 1.50 m. How much current flows onto the spacecraft?

Asap

A positive charge moves near a very long wire carrying a current as shown. If the 3.1 C charge moves at 9×105 m/s and is 11 cm away from the 7 A current in the long wire, what is the magnitude of the force on the charge? (in N)(a) 1.26(b) 3.55×101(c) 1.95×107(d) 1.12×102

A caterpillar of length 6.00 cm crawls in the direction of electron drift along a 8.20-mm-diameter bare copper wire that carries a uniform current of 38.0 A. (a) What is the potential difference between the two ends of the caterpillar? (b) Is its tail positive or negative relative to its head? (c) How much time does the caterpillar take to crawl 2.30 cm if it crawls at the drift speed of the electrons in the wire? (The number of charge carriers per unit volume is 8.49 × 1028 m-3 and resistivity of copper is 1.69 × 10-8 Ω·m.)

Consider a steady beam of protons. Each proton has kinetic energy 20 MeV. The beam represents a current of 0.25 μA. a) What is the potential difference through which the protons are accelerated? b) If the beam is directed perpendicular to a flat surface, how many protons strike the surface in 3 seconds?

The vector current density of a 3m long and 3mm diameter conductor is given as 155630 A/m^2. Determine the curent on the conductor, its free electron density, the drift velocity of the charges and the number of electrons passing through the conductor for 3 seconds.