3. With two devices X and Y and the simplex mode of serial data transmission between the two, data can be: A Simultaneously transmitted from X to Y and Y to X. B Only transmitted in one direction, X to Y or Y to X, at once. C Sequentially transmitted, for example, from X to Y followed by Y to X. D Only ever transmitted in one direction, for example, X to Y but not Y to X.

Explain in really basic terms what is electric and magnetic field ‘? What is TEM mode explain in very basic way anyone can understand?

please solve asap

A 100 hp, 1750 rpm, d.c. shunt motor has an armature inductance of 1.15 mH, a resistance of 0.0155 2 and an armature voltage constant of 1.3V.s/rad. The motor is operated from a three-phase half-wave controlled-rectifier at rated armature current of 35 A. Find the firing angle a, assuming that the supply voltage is 400 V and the motor speed is 1750 rpm. Consider the thyristors to have a forward voltage drop of 1.5 Volt and assume continuous conduction.