MCQOPTIONS
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MCQOPTIONS
| 1. |
A wire of length L and radius r is rigidly fixed at one end. On stretching the other end of the wire with a force F, the increase in its length is l. If another wire of same material but of length 2L and radius 2r is stretched with a force of 2F, the increase in its length will be [NCERT 1980; AIIMS 1980; MP PET 1989, 92; MP PET/PMT 1988; MP PMT 1996, 2002; UPSEAT 2002] |
| A. | l |
| B. | 2l |
| C. | \[\frac{l}{2}\] |
| D. | \[\frac{l}{4}\] |
| Answer» B. 2l | |