MCQOPTIONS
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				| 1. | 
                                    The polarity of an unmarked horse shoe magnet can be determined by using [NDA] | 
                            
| A. | a charged glass rod | 
| B. | a magnetic compass | 
| C. | an electroscope | 
| D. | another unmarked bar magnet | 
| Answer» C. an electroscope | |