1. Find the periods and fundamental frequencies of the following signals a. xa(t) = 2 cos (10rt +2) b. Xp(t) = 5 cos (17nt –) %3D %3D c. xc(t) = 3 sin ( 19t –-) %3D d. xa(t) = xa(t) + x„(t) e. xe(t) = xa(t) + xc(t) f. x; (t) = xp(t) + x-(t) %3D

You are an electrician working on an overhead crane. The crane uses a large electromagnet to pick up large metal pipes. The magnet must have a minimum of 200 VDC to operate properly. The crane has an AC source of 240 V. You are given four diodes that have a peak voltage rating of 400 V each. These diodes are to be used to form a bridge rectifier to convert the AC voltage into DC voltage. Is the voltage rating of the diodes sufficient? To the nearest volt, what will be the DC output voltage of the bridge rectifier?

Referring to Figure , you measure the potential at the connection points R1 and R2  of 3 V. If you get a potential of 0 V at the connection point of the diode and R3, what can you do  explain about the condition of the circuit?

You are an electrician working on an overhead crane. The crane uses a large electromagnet to pick up large metal pipes. The magnet must have a minimum of 200 VDC to operate properly. The crane has an AC source of 240 V. You are given four diodes that have a peak voltage rating of 400 V each. These diodes are to be used to form a bridge rectifier to convert the AC voltage into DC voltage. Is the voltage rating of the diodes sufficient? To the nearest volt, what will be the DC output voltage of the bridge rectifier?