(Solved): A shunt connected DC motor with negligible rotational losses has the magnetization curve shown belo ...

A shunt connected DC motor with negligible rotational losses has the magnetization curve shown below where \( \mathrm{M}=60 \mathrm{~V} / \mathrm{A} \) and \( \omega_{\mathrm{m}}=100 \mathrm{rnd} / \mathrm{scc} \). The suppited voltage, \( \mathrm{V}_{\mathrm{T}} \), is \( 250 \mathrm{~V}, \mathrm{RA}=5 \Omega \) and \( \mathrm{R}=25 \Omega \). What is the torque on the motor if the speed f the motor does not change when \( R \) adj changes from \( 15 \Omega \) to \( 35 \Omega ? \) (20 points)