ASVAB Electronics Information Practice Test 770939

Question 1 of 5
Battery Configurations

Batteries can be connected together in various combinations to increase their total voltage and/or total current. Connecting batteries in series combines their voltage while keeping their current the same, connecting batteries in parallel combines their current while keeping their voltage the same, and using a series-parallel configuration, half the batteries can be connected in series and half in parallel to combine both voltage and current.

Suppose you have 4 [15V 10A] batteries that you can connect together in series, in parallel, or in series-parallel. Which of the following voltage and ampere combinations cannot be attained using these 4 batteries?
120V 80A
15V 40A
60V 10A
30V 20A