Question

I need help with: Two (2) physics lab Questions on "Ohm's Law: Ohmic and Nonohmic Circuit Elements" And three (3) lab questions on "The ratio of e/ m for electrons.'

Answer 1

1)    Here, I = 0.25 A

=> R' = 0.001 * 50 = 0.05 ohm

   => percent error = (0.001 * 50)/(0.2 * 200) * 100%

                           = 0.125 %

2)   percent error = (0.01 * 1)/(0.1 * 100) * 100%

                           = 0.1 %

1)   evB = mv²/r

   eV = 1/2mv²

Here, eliminating v²

=> e/m = 2V/(r²B²)

2)    speed of electrons = sqrt(2 * 1.6 * 10^-19 * 60/9.11 * 10^-31)

                                       = 4.59 * 10⁶ m/sec

3)    Here,   B = (uo/2) * I/r

    =>   B = 2 * 3.14 * 10^-7 * 2.5/0.01

              =   1.57 * 10^-4 T

=> % error =    0.5 %