MCQOPTIONS
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MCQOPTIONS
| 1. |
A closely wound coil of 100 turns and area of cross-section \[1\ c{{m}^{2}}\] has a coefficient of self-induction 1 mH. The magnetic induction in the centre of the core of the coil when a current of 2A flows in it, will be [MP PET 1992] |
| A. | \[0.022\ Wb{{m}^{-2}}\] |
| B. | \[0.4\ Wb\ {{m}^{-2}}\] |
| C. | \[0.8\ Wb\ {{m}^{-2}}\] |
| D. | \[1\ Wb\ {{m}^{-2}}\] |
| Answer» B. \[0.4\ Wb\ {{m}^{-2}}\] | |