26. Which one of the following statements is true for the voltages in a series RC circuit?

A. The total voltage is equal to the sum of the voltages across the resistance and capacitance
B. The voltage always has the same amplitude and phase for every part of the circuit
C. The total voltage is less than the sum of the voltages across the resistance and capacitance
D. The total voltage is greater than the sum of the voltages across the resistance and capacitance
E. None of the above

27. A battery is a device composed of one or more:

A. chemical cells
B. voltage generators
C. solar cells
D. piezoelectric cells
E. None of the above

28. Doubling the operating voltage of a purely capacitive circuit:

A. has no effect on the capacitive reactance
B. doubles the amount of capacitive reactance
C. multiplies the capacitive reactance by 7
D. cuts the capacitive reactance in half
E. None of the above

29. How much current flows through a 0.02-H choke that is operating from a 12-V ac, 100-Hz source?

A. 0.02 A
B. 0.955 A
C. 10 A
D. 2.02 A
E. None of the above

30. The transistor has a collector current of 10 mA and a base current of 40 mA. What is the current gain of the transistor?

A. 250 μA
B. 350 μA
C. 0.25 μA
D. 300 μA
E. None of the above