Question

Question 1 Not yet answered Marked out of 10.00 An electrical current of 8.50 mA exists in a solid cylindrical wire whose diameter is 1.50 mm. Calculate the magnitude of the current density in the wire. Put your answer in the form of "a.bc x 10 (x) Answer Not yet answered Marked out of 10.00 Question 2 The resistivity of the wire is 15.8 x 108 Ohm.m and its length is 10.5 m. Determine the electrical resistance of the wire. Give your answer in the form "a.bc x 10 (x)" Ohm. Answer Not yet answered Marked out of 10.00 Question3 What is the potential difference between the ends of the wire to cause the current in 1a? Give your answer in the form "a.bc x 10(x) V"

there is no specific figure for the fourth question. it's just described.