Question

1. A cosmic-ray proton in interstellar space has an energy of 20.0 MeV and executes a circular orbit having a radius equal 5.80x1010 m. What is the magnetic field in that region of space? 2. The ammeter shown in figure I reads 4.00 A. Determine the values of the currents across the 32 and 7 12 also the voltage of €. 522 712 AO w +25 V Figure 1 10123

Answer 1

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4. Hrsells w that that know the we the since expression, exbre R=J2Emp eB or B = 2 Emp se = 1.681619 9 mp = 1.67X10 27 kg ER LE = 20 MeV (R = 5,8x100 2x 20x1.6X163/1.67X1827 1.6x1019x5.881010 10.34 x 10-20 9, 28 8109 (1-4) A 25v 30 B = 1.11x101 (KVL lou) In look ! &-BI-SI-40=0 31 ) ī E-81-40 = 0 --O o zlor In loop - (2) -7(1-4)-25 + 40 =0 Nam using equation , we have - 7I+28+15 20 I = 6.14 A -- E = 8x 6.19 + 40 = 89.12 V I &=89.12v = current across the Bu is; (I = 6.14 AN & Current across the 7 n is = 1-4 = 6.14-4 = 2.14 A v -- - -