A current his value is 3 A in wire passing through nickel chromium ste (r = 0.0321mm,p = 1.5 x 10-60m) and his length 2 m , calculate a) the current density J the passes through the wire b) the magnitude of electric field in the wire c) the wire resistance

Two positive point charges q1=4.40 uC and q2=6.40 uC are separated in vaccum in distacne of 6.0m find the magnitude of the net electric at point r!=4.80m from q1 in N/C

ANS: 5) You use a voltmeter to measure potential difference from a very long wire carries a uniform linear charge density 2. The meter reads 450V when one probe of the meter is placed 4.5 cm from the wire and the other probe is 2.5 cm farther from the wire. What is 2? a) 9 x 107 C/m b) 9 x 10 C/m c) 2.5 x 10-7 C/m d) 2.5 x 10 C/m e) none of above ANS: