4)Based on millikans experiment the charge in coulombs required to suspend a 1.7 x 10^-13 kg of oil in an electric field with intensity 1.25×10^5 N/C is?

1) A straight wire carrying a current of 10.0 A is parallel to but 23 m away from wire 2 carrying a current of 3.0A assume both wires are 1.0m long and the current is travelling in the same direction in eatch to calculate th magnintude of the force between the wires U= 4Pie x 10^-7 tm/a

A magnetic force fm cuases a positively charged particle q to travel in a circular path in a magnetic field b the radius of the circular motion is r an expression to calculate the positively charged particles velocity is