1. The more dry cells, the A weaker B. messier the electromagnetis C. stronger D. more efective 2. What is created when a magnet moves through a coll of wire? A ferromagnet C. temporary magnet B. electromagnet D. permanent magnet 3. What should you do if you want to increase the strength of your electromagnet? A use a shorter nail. B. choose a thinner nal. C. increase the number of batteries D. lessen the number of tums of the wire. For numbers 4 and 5. An experiment was conducted to explore the strength of an electromagnet using different number of batteries. The table below shows the observation CIRCUIT Paper Clips Attracted by Electromagnet 3 6 8 12 B с 4. Which circuit has the most number of batteries? A. circuit A B. circuit B C. circuit с D. circut D 5. Which circuit has the least number of batteries? A circuit A B. circuit B C. circuit c D. circuit D​