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				| 1. | An electric wire of length ?I? and area of cross-section \[a\] has a resistance R ohms. Another wire of the same material having same length and area of cross-section 4a has a resistance of [MP PMT 1993] | 
| A. | 4R | 
| B. | R/4 | 
| C. | \[\gamma \times \]pressure | 
| D. | 16R | 
| Answer» C. \[\gamma \times \]pressure | |