3. The electromagnetic relay given in Fig. 2 excited from a voltage source. The coil current is expressed in terms of the flux linkage 2 and the distance x as: i = 2² +22(x-1) A; x<1 a) Find the force on the moving part as a function of a and x. b) If the force on the moving part is equal to 4 Newtons when the distance x is equal to 0.5 m, find the current drawn from the source for this particular condition.

3. The electromagnetic relay given in Fig. 2 excited from a voltage source. The coil current is expressed in terms of the flux linkage 2 and the distance x as: i = 2² +22(x-1) A; x<1 a) Find the force on the moving part as a function of a and x. b) If the force on the moving part is equal to 4 Newtons when the distance x is equal to 0.5 m, find the current drawn from the source for this particular condition.