The variable resistor R in Fig. 4.133 is adjusted until it absorbs the maximum power from the circuit. (a) Calculate the value of R for maximum power. (b) Determine the maximum power absorbed by R.
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The subsequent problems refer to the following circuit and variable definitions: 
If Vs=5V, which direction are electrons flowing in the circuit:
A. in neither direction B. from right to left C. in both directions simultaneously D. from left to right
Vehicles equipped with diesel engines may have two batteries connected in parallel in order to provide additional current at the same voltage. Technician A says to successfully test the batteries, they should be disconnected and tested separately. Technician B says that a fault in one battery has NO effect on the other battery. Who is right?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
____________________ are, by far, the most widely used electrical component.
Fill in the blank(s) with the appropriate word(s).
Technician A says that water-base paint has no VOCs. Technician B says that water-base clearcoats help reduce VOC release. Who is correct?
A. Technician A only B. Technician B only C. Both Technicians A and B D. Neither Technician A nor B