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P Not signed in IMastersingpl 23A Electromagnetic O webassign net/web/Student/Assignment-ResponsesMast?dep 15372217 Sutm/t Answerl Save Progress Practice Another Version -1 points osColPhys2016 23.6 WA 027 Suppose a motor connected to a 121 V source draws 19.3 A when it first starts. (a) What is its resistance? (b) What current does it draw at its normal operating speed when it develops a 100 v back emf? Additional Materials Reading a. O -1 points oscoPhys2016 236 WA 028 The motor n v back emf at normal speed. If it draws 3.00 A at normal speed, what current does it draw when starting? a toy car operates on 6.40 v, developing a 4.10 Reading Subrt Assagnment Save Assignment Progress Extension

Explanation / Answer

GIVEN THAT

V =121 v

I= 19.3 A

A)Resistance

R =V/I =121v/19.3A =6.269 ohms

B) current

V= 121v-100v = 21 v

I =V/R = 21v/6.269 ohms =3.350 A

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